Christoph Koster, chief executive of digital Islamic community bank ruya, lives a balanced lifestyle and does not get too hung up on material purchases. Antonie Robertson / The National
Christoph Koster, chief executive of digital Islamic community bank ruya, lives a balanced lifestyle and does not get too hung up on material purchases. Antonie Robertson / The National
Christoph Koster, chief executive of digital Islamic community bank ruya, lives a balanced lifestyle and does not get too hung up on material purchases. Antonie Robertson / The National
Christoph Koster, chief executive of digital Islamic community bank ruya, lives a balanced lifestyle and does not get too hung up on material purchases. Antonie Robertson / The National

Money & Me: ‘My best investment is an Abu Dhabi property purchased at the height of Covid-19’


Deepthi Nair
  • English
  • Arabic

Christoph Koster, chief executive of UAE’s digital Islamic community bank ruya, considers a house he purchased in Yas Island, Abu Dhabi, at the height of the Covid-19 pandemic his best investment since it appreciated in value considerably.

Having grown up in Germany, his parents instilled in him the value of living below one’s means and he continues to abide by it. Mr Koster adjusts his lifestyle according to his income.

Ajman-based ruya has been active in the market for just more than a year, he tells The National. The lender launched with retail banking and then opened up SME banking in November. So far, ruya has onboarded 60,000 customers in one year.

“At the current rate, we plan to on-board about 100,000 new customers every year. We became the first Islamic bank globally to enable customers to buy and sell virtual assets, including Bitcoin, directly on the banking app in partnership with digital assets infrastructure provider Fuze,” he says.

Before his role at ruya, Mr Koster served as the chief operating officer at a G42 joint venture, where he was responsible for building the business unit from its incubation phase. Before G42, he was vital member of the executive management team at the Abu Dhabi Investment Office.

He also had a stint with Emirates NBD and began his career at consulting company Roland Berger.

Mr Koster is a business graduate from the UK and has spent about 20 years in banking across Europe and the Middle East. The German, 41, has been in the UAE for 15 years and lives with his family on Dubai’s Palm Jumeirah.

Did wealth feature in your childhood?

I'm a big believer in starting financial education early on. My parents instilled in me a habit of always living below my needs, and to always save and invest early on. This is something that I'm trying to instil in my children as well.

How did you first earn?

My first job was in Germany at the age of 14 when I started working with a local roofing company. I was tiling roofs in the neighbourhood. Throughout my teenage years and university, I always earned with jobs on the side. It is important for children and young adults today to earn and learn to appreciate the value of labour.

Any early financial jolts?

As a young adult or as a student, you don't live a lavish life. But I think it's important to live within your means. The most important thing is to be able to adjust your lifestyle according to your income. This varies across stages in life and you have to be flexible.

I was always able to adjust my cost of living and my living standards according to the means that I had available.

How do you grow your wealth?

I am a big believer in a balanced approach to investments. It is very important to have a balanced portfolio of investments, especially long-term ones. I don't believe in short-term speculative trading. I'm more of a believer in long-term, structured and frequent wealth-building. I also invest in a diversified portfolio of stocks, exchange-traded funds, Bitcoin, real estate and gold.

Are you a spender or a saver?

A balanced and moderate approach is the best. So, I try to enjoy life within the means that we have, while building sustainable and multi-generational wealth for the future.

Have you been wise with money?

I don't have any regrets. I've lived within my means and built a life for our family with what I have available. I don't think I’m missing out on anything, nor have we made obvious mistakes, so I'm generally content.

What has been your best investment?

We were fortunate enough to invest in real estate in the UAE, and that has appreciated quite a bit, especially over the past couple of years. We took a bit of risk and bought a house in Yas Island, Abu Dhabi, at the height of the pandemic, but at the bottom of the market in late 2020. We lived in this house for about three-and-a-half years.

Any cherished purchases?

I am not materialistic, so, I don't have any cherished purchases. For us, it's about living a balanced lifestyle and not to get too hung up on material purchases.

Any financial advice for your younger self?

It would be to have an even more structured approach to investment. I would advise every young person to start as early as possible with regular, structured investments. Even if it's just Dh50 a month, it grows and it compounds over time. People tend to underestimate the power of time. No amount of money is too small to be invested. The earlier you start with whatever you have available, it will grow over time. It’s best to invest in a diversified basket, diversified both from an asset class and geographical point of view.

What are your financial goals?

The ultimate goal that we strive for is financial independence, to be able to reach a point where you have accumulated enough income streams that are independent of your day job to be able to finance your cost of living. That is the ultimate goal, which for most people is very hard to achieve at least until they've reached pension age. I haven't achieved it yet.

Christoph Koster advises all young people to start regular, structured investments as early as possible. Antonie Robertson / The National
Christoph Koster advises all young people to start regular, structured investments as early as possible. Antonie Robertson / The National

What luxuries are important to you?

Time is the ultimate luxury for me and for my family. I'm trying to spend as much time as possible with my family and friends, because time is the most limited and scarcest asset that we have, and that, for me, is the ultimate luxury.

How do you feel about money?

Money is a means to an end. It is a form of transaction. Money shouldn't be the end goal or the objective in life. It is a means to your objectives and goals in life. Money doesn't buy happiness, but it certainly takes away some of your worries, if you are able to live within your means.

Get Out

Director: Jordan Peele

Stars: Daniel Kaluuya, Allison Williams, Catherine Keener, Bradley Whitford

Four stars

The specs

Engine: 4.0-litre V8 twin-turbocharged and three electric motors

Power: Combined output 920hp

Torque: 730Nm at 4,000-7,000rpm

Transmission: 8-speed dual-clutch automatic

Fuel consumption: 11.2L/100km

On sale: Now, deliveries expected later in 2025

Price: expected to start at Dh1,432,000

The specs: 2017 Dodge Viper SRT

Price, base / as tested Dh460,000

Engine 8.4L V10

Transmission Six-speed manual

Power 645hp @ 6,200rpm

Torque 813Nm @ 5,000rpm

Fuel economy, combined 16.8L / 100km

UAE currency: the story behind the money in your pockets
Results

4pm: Al Bastakiya Listed US$300,000 (Dirt) 1,900m; Winner: Emblem Storm, Oisin Murphy (jockey), Satish Seemar (trainer).

4.35pm: Mahab Al Shimaal Group 3 $350,000 (D) 1,200m; Winner: Wafy, Tadhg O’Shea, Satish Seemar.

5.10pm: Nad Al Sheba Turf Group 3 $350,000 (Turf) 1,200m; Winner: Wildman Jack, Fernando Jara, Doug O’Neill.

5.45pm: Burj Nahaar Group 3 $350,000 (D) 1,600m; Winner: Salute The Soldier, Adrie de Vries, Fawzi Nass.

6.20pm: Jebel Hatta Group 1 $400,000 (T) 1,800m; Winner: Barney Roy, William Buick, Charlie Appleby.

6.55pm: Al Maktoum Challenge Round-3 Group 1 $600,000 (D) 2,000m; Winner: Matterhorn, Mickael Barzalona, Salem bin Ghadayer.

7.30pm: Dubai City Of Gold Group 2 $350,000 (T) 2,410m; Winner: Loxley, Mickael Barzalona, Charlie Appleby.

FIGHT%20CARD
%3Cp%3E%3Cstrong%3EFeatherweight%204%20rounds%3A%3C%2Fstrong%3E%3Cbr%3EYousuf%20Ali%20(2-0-0)%20(win-loss-draw)%20v%20Alex%20Semugenyi%20(0-1-0)%3Cbr%3E%3Cstrong%3EWelterweight%206%20rounds%3A%3C%2Fstrong%3E%3Cbr%3EBenyamin%20Moradzadeh%20(0-0-0)%20v%20Rohit%20Chaudhary%20(4-0-2)%3Cbr%3E%3Cstrong%3EHeavyweight%204%20rounds%3A%3C%2Fstrong%3E%3Cbr%3EYoussef%20Karrar%20(1-0-0)%20v%20Muhammad%20Muzeei%20(0-0-0)%3Cbr%3E%3Cstrong%3EWelterweight%206%20rounds%3A%3C%2Fstrong%3E%3Cbr%3EMarwan%20Mohamad%20Madboly%20(2-0-0)%20v%20Sheldon%20Schultz%20(4-4-0)%3Cbr%3E%3Cstrong%3ESuper%20featherweight%208%20rounds%3A%3C%2Fstrong%3E%3Cbr%3EBishara%20Sabbar%20(6-0-0)%20v%20Mohammed%20Azahar%20(8-5-1)%3Cbr%3E%3Cstrong%3ECruiseweight%208%20rounds%3A%3C%2Fstrong%3E%3Cbr%3EMohammed%20Bekdash%20(25-0-0)%20v%20Musa%20N%E2%80%99tege%20(8-4-0)%3Cbr%3E%3Cstrong%3ESuper%20flyweight%2010%20rounds%3A%3C%2Fstrong%3E%3Cbr%3ESultan%20Al%20Nuaimi%20(9-0-0)%20v%20Jemsi%20Kibazange%20(18-6-2)%3Cbr%3E%3Cstrong%3ELightweight%2010%20rounds%3A%3C%2Fstrong%3E%3Cbr%3EBader%20Samreen%20(8-0-0)%20v%20Jose%20Paez%20Gonzales%20(16-2-2-)%3C%2Fp%3E%0A

Super Rugby play-offs

Quarter-finals

  • Hurricanes 35, ACT 16
  • Crusaders 17, Highlanders 0
  • Lions 23, Sharks 21
  • Chiefs 17, Stormers 11

Semi-finals

Saturday, July 29

  • Crusaders v Chiefs, 12.35pm (UAE)
  • Lions v Hurricanes, 4.30pm
Results

Men's finals

45kg:Duc Le Hoang (VIE) beat Zolfi Amirhossein (IRI) points 29-28. 48kg: Naruephon Chittra (THA) beat Joseph Vanlalhruaia (IND) TKO round 2.

51kg: Sakchai Chamchit (THA) beat Salam Al Suwaid (IRQ) TKO round 1. ​​​​​​​54kg: Veerasak Senanue (THA) beat Huynh Hoang Phi (VIE) 30-25.

57kg: Almaz Sarsembekov (KAZ) beat Tak Chuen Suen (MAC) RSC round 3. 60kg: Yerkanat Ospan (KAZ) beat Ibrahim Bilal (UAE) 30-27.

63.5kg: Abil Galiyev (KAZ) beat Nouredine Samir (UAE) 29-28. 67kg: Narin Wonglakhon (THA) beat Mohammed Mardi (UAE) 29-28.

71kg: Amine El Moatassime (UAE) w/o Shaker Al Tekreeti (IRQ). 75kg:​​​​​​​ Youssef Abboud (LBN) w/o Ayoob Saki (IRI).

81kg: Ilyass Habibali (UAE) beat Khaled Tarraf (LBN) 29-28. 86kg: Ali Takaloo (IRI) beat Emil Umayev (KAZ) 30-27.

91kg: Hamid Reza Kordabadi (IRI) beat Mohamad Osaily (LBN) RSC round 1. 91-plus kg: Mohammadrezapoor Shirmohammad (IRI) beat Abdulla Hasan (IRQ) 30-27.

Women's finals

45kg: Somruethai Siripathum (THA) beat Ha Huu Huynh (VIE) 30-27. 48kg: Thanawan Thongduang (THA) beat Colleen Saddi (PHI) 30-27.

51kg: Wansawang Srila Or (THA) beat Thuy Phuong Trieu (VIE) 29-28. 54kg: Ruchira Wongsriwo (THA) beat Zeinab Khatoun (LBN) 30-26.

57kg: Sara Idriss (LBN) beat Zahra Nasiri Bargh (IRI) 30-27. 60kg: Kaewrudee Kamtakrapoom (THA) beat Sedigheh Hajivand (IRI) TKO round 2.

63.5kg: Nadiya Moghaddam (IRI) w/o Reem Al Issa (JOR).

Who's who in Yemen conflict

Houthis: Iran-backed rebels who occupy Sanaa and run unrecognised government

Yemeni government: Exiled government in Aden led by eight-member Presidential Leadership Council

Southern Transitional Council: Faction in Yemeni government that seeks autonomy for the south

Habrish 'rebels': Tribal-backed forces feuding with STC over control of oil in government territory

Who was Alfred Nobel?

The Nobel Prize was created by wealthy Swedish chemist and entrepreneur Alfred Nobel.

  • In his will he dictated that the bulk of his estate should be used to fund "prizes to those who, during the preceding year, have conferred the greatest benefit to humankind".
  • Nobel is best known as the inventor of dynamite, but also wrote poetry and drama and could speak Russian, French, English and German by the age of 17. The five original prize categories reflect the interests closest to his heart.
  • Nobel died in 1896 but it took until 1901, following a legal battle over his will, before the first prizes were awarded.
Did you know?

Brunch has been around, is some form or another, for more than a century. The word was first mentioned in print in an 1895 edition of Hunter’s Weekly, after making the rounds among university students in Britain. The article, entitled Brunch: A Plea, argued the case for a later, more sociable weekend meal. “By eliminating the need to get up early on Sunday, brunch would make life brighter for Saturday night carousers. It would promote human happiness in other ways as well,” the piece read. “It is talk-compelling. It puts you in a good temper, it makes you satisfied with yourself and your fellow beings, it sweeps away the worries and cobwebs of the week.” More than 100 years later, author Guy Beringer’s words still ring true, especially in the UAE, where brunches are often used to mark special, sociable occasions.

UAE'S%20YOUNG%20GUNS
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White hydrogen: Naturally occurring hydrogenChromite: Hard, metallic mineral containing iron oxide and chromium oxideUltramafic rocks: Dark-coloured rocks rich in magnesium or iron with very low silica contentOphiolite: A section of the earth’s crust, which is oceanic in nature that has since been uplifted and exposed on landOlivine: A commonly occurring magnesium iron silicate mineral that derives its name for its olive-green yellow-green colour

Silent Hill f

Publisher: Konami

Platforms: PlayStation 5, Xbox Series X/S, PC

Rating: 4.5/5

Visit Abu Dhabi culinary team's top Emirati restaurants in Abu Dhabi

Yadoo’s House Restaurant & Cafe

For the karak and Yoodo's house platter with includes eggs, balaleet, khamir and chebab bread.

Golden Dallah

For the cappuccino, luqaimat and aseeda.

Al Mrzab Restaurant

For the shrimp murabian and Kuwaiti options including Kuwaiti machboos with kebab and spicy sauce.

Al Derwaza

For the fish hubul, regag bread, biryani and special seafood soup. 

Strait of Hormuz

Fujairah is a crucial hub for fuel storage and is just outside the Strait of Hormuz, a vital shipping route linking Middle East oil producers to markets in Asia, Europe, North America and beyond.

The strait is 33 km wide at its narrowest point, but the shipping lane is just three km wide in either direction. Almost a fifth of oil consumed across the world passes through the strait.

Iran has repeatedly threatened to close the strait, a move that would risk inviting geopolitical and economic turmoil.

Last month, Iran issued a new warning that it would block the strait, if it was prevented from using the waterway following a US decision to end exemptions from sanctions for major Iranian oil importers.

Notable groups (UAE time)

Jordan Spieth, Si Woo Kim, Henrik Stenson (12.47pm)

Justin Thomas, Justin Rose, Louis Oosthuizen (12.58pm)

Hideki Matsuyama, Brooks Koepka, Tommy Fleetwood (1.09pm)

Sergio Garcia, Jason Day, Zach Johnson (4.04pm)

Rickie Fowler, Paul Casey, Adam Scott (4.26pm)

Dustin Johnson, Charl Schwartzel, Rory McIlroy (5.48pm)

AIDA%20RETURNS
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Updated: June 08, 2025, 12:40 PM