Australian computer scientist and entrepreneur Craig Steven Wright said Thursday that he would no longer try to prove his claim that he was the creator of the digital currency bitcoin.
In a video on Monday, he had admitted to being behind the Satoshi Nakamoto pseudonym linked to bitcoin since the cryptocurrency was created in 2008.
Wright, who had previously denied that he was the mysterious Satoshi Nakamoto, offered purported proof this week of his claim, but some technology experts have vehemently questioned Wright's veracity.
On his website, Wright posted a note declaring that he would make no more attempts to convince doubters.
"I believed that I could put the years of anonymity and hiding behind me," he wrote. "But, as the events of this week unfolded and I prepared to publish the proof of access to the earliest keys, I broke. I do not have the courage."
Wright said that "the world will never believe" and seemed to declare his withdrawal from the public eye: "I can only say I'm sorry. And goodbye."
Wired magazine and the website Gizmodo had named Wright the suspected founder of bitcoin in December, and police raided his home soon after. The revelation was called into question when a person or persons claiming to be Nakamoto denied that Wright was the creator.
"I was the main part of it, but other people helped me," Wright said in the video in which he acknowledged the claim. "I want to keep doing what I want to do. I don't want money. I don't want fame. I don't want adoration. I just want to be left alone."