Autumn Radtke, chief executive of virtual currency exchange First Meta Pte Ltd, was found dead on Feb. 26. Police said they were investigating her "unnatural" death, and "preliminary investigations showed no foul play is suspected."
Neighbors said they thought Radtke jumped to her death from a residential apartment complex near her home.
Friends and colleagues said Radtke, 28, was wrestling with professional and personal pressures, not least running a start-up that was struggling to gain traction.
"She had a phenomenal network of highly successful people around her, and here she is running this little exchange and it just isn't taking off in the way anybody had hoped," Steve Beauregard, CEO and founder of GoCoin, a start-up which provided bitcoin-related services to First Meta, told Reuters.
Beauregard rented a room in Radtke's large Singapore home-cum-office and was among the last people to see her alive.
Bitcoin is under scrutiny after Tokyo-based Mt. Gox, once the world's dominant exchange for the virtual currency, filed for bankruptcy in Japan last week, blaming hackers for the loss of 850,000 bitcoins - worth more than $550 million at today's rates. A smaller, Canada-based exchange also shut, saying hackers had stolen all its bitcoins.
Douglas Abrams, director of First Meta, denied the company was struggling or up for sale, and said Radtke "did a great job as CEO." But he said selling the company always remained an option and there had been plans to save money by moving out of its current office space, a townhouse which doubled as Radtke's home.
Beauregard and others said First Meta, which initially functioned as an online trade platform for the currency used in the Second Life online world, and then expanded to other games, was not primarily involved in bitcoin. Last year, it allowed users to sell bitcoins for dollars and last month signed a deal with GoCoin.
"I'm not trying to distance First Meta from bitcoin, but it doesn't provide two-way trading in bitcoin," Abrams told Reuters.
Friends said Radtke, however, was a huge fan of bitcoin and had invested in it personally. One said she had persuaded friends to invest as well. Her Facebook page includes several links to bitcoin stories, mostly celebrating last year's rise in value.
In one, she comments on a sharp but brief dip in the bitcoin price last December: "The 'panic' or as I call it Christmas sale was great! Real bitcoiners got 30-40 percent off."
"She had substantial exposure to the ups and downs of bitcoin, and while it's not likely to be the sole reason to this tragedy, it would be naive to think it didn't have a role," said one friend.
Others contested any role the virtual currency had in her death.
Beauregard said he had several conversations with her in the 48 hours prior to her death about personal and professional issues. "Bitcoin and Mt. Gox were not part of those conversations," he said.
Radtke, who moved to Singapore in early 2012, previously worked at another start-up in Santa Monica, California.
Plug and Play's Scott Robinson, who focuses on Silicon Valley bitcoin start-ups, said Radtke's years of experience in video game virtual currencies made her an instant expert and an asset to the relatively young, predominantly male, bitcoin community.
"She was a go-getter, she always worked very hard ... she stuck out as one of the only women representing bitcoin."
Before heading up First Meta, Radtke had business development roles at tech start-ups Xfire and Geodelic Systems, according to information on her LinkedIn profile.