As a market trader for Goldman Sachs and Morgan Stanley, Tiantian Kullander was one of the people who started the Hong Kong-based company Amber Group.

Because of how quickly he rose to success, Forbes put him on their prestigious 30-under-30 list in 2019 in the Asia Finance and Venture Capital category.

But it was said this week that Mr. Kullander died on November 23 while he was sleeping.

In a statement, a spokesperson for Amber Group said:

Tiantian (or “TT”, as he was lovingly known) was instrumental to the founding of Amber and a pillar of our success.

He put his heart and soul into the company, in every stage of its growth. He led by example with his intellect, generosity, humility, diligence and creativity.

It went on:

We lost a great partner and a true friend in TT and words cannot express our sorrow at this time.

TT’s legacy will live on and we will work even harder to make Amber the category-defining leader of our industry, as this was TT’s ambition and dream.

TT was a devoted husband, a loving father and a fierce friend. His passing is a tragedy and our thoughts and prayers are with his family.

He is survived by his wife and their beloved son. We kindly request that you respect their privacy during this difficult time.

Mr. Kullander was also on the board of directors for the e-sports company Fnatic and created the decentralized finance app KeeperDAO.

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He is the second young person in the cryptocurrency business to die in the past few weeks.

Nikolai Mushegian, who made a lot of money in technology, drowned on a beach in Puerto Rico a few weeks ago.

The 29-year-old was sure that the CIA was out to get him, and he tweeted about it just hours before he died.

His final post read:

CIA and Mossad and pedo elite are running some kind of sex trafficking entrapment blackmail ring out of Puerto Rico and Caribbean islands.

They are going to frame me with a laptop planted by my ex [girlfriend] who was a spy. They will torture me to death.

But, despite what he said, his family does not think there is anything strange about how he died.

Brock Pierce, an entrepreneur who also works with cryptocurrency, told a source:

His mother clarified that his death had nothing to do with his [conspiracy] tweets.

He was a beautiful man and a child at heart. He was also an incredible visionary, I don’t call people brilliant very often but Nikolai was brilliant.