But debate continues as to whether bitcoin has merit as a speculative investment or a store of value.
Andreas and Thomas Struengmann added $8 billion to their wealth this year thanks to a stake in BioNTech.
Soros Fund Management offers pay significantly higher than that of most executives at family offices.
Andrey Andreev pocketed at least $1.5 billion from Blackstone Group Inc. after selling a stake in a dating apps company.
Even with the delayed IPOs, Ma's fortune is still worth $54 billion.
The Mansours are part of a trend of the world's wealthy rejecting traditional investment intermediaries.
But Barclays' primary focus will be on the U.S. domestic market.
Thomas Faust boasts a 3% stake and stock options in Eaton Vance, which is being bought by Morgan Stanley.
Thomas Healy was trying to turn his truck electrification start-up into a publicly company when coronavirus struck.
Since March, the Done family has doubled its holdings in William Hill to 6%, via a company they control.