A publicity stunt which saw four bitcoin fans bury $50,000 in cryptocurrency on Mount Everest has ended in tragedy with the mysterious death of their Sherpa guide.
Ukranian social network ASKfm paid for the men to climb Everest last week, but they claimed to have lost experienced guide Lam Babu during the ascent, saying he went "missing".
However, other veteran mountaineers have come forward to cast doubt on that version of events, claiming that the Sherpa was struck by snow blindness and "left behind" by the climbers.
One mountaineer, Alan Arnette, a Colorado blogger who covers Everest, cast serious doubt on the claims of the 'crypto-enthusiasts'.
"I find it hard to understand how the 45-year-old Sherpa developed snow blindness, was reported to be staggering and no one was able to help him," Arnette wrote.