According to Timothy Peterson of Cane Island Alternative Advisors, the number of irretrievably lost bitcoins has reached 6 million, leaving 13.3 million in circulation. Peterson predicts that out of the 1.7 million bitcoins that will be mined in the next 100 years or more, one million will be lost in the same period. Peterson's estimate is in line with his 2020 prediction that ongoing losses of an estimated 1,500 BTC per day mean that fewer than 14 million coins will ever circulate. Despite some bitcoiners questioning or dismissing Peterson's claims, he uses the same findings to back his latest prediction. The Bitcoin Researcher claims that the number of BTC in circulation is actually 15.5 million, based on the assumption that coins that haven't moved in seven years are lost. (Bitcoin.com)