Strategy purchases 4020 BTC again, with a year to date yield of 16.8% According to Michael Saylor, MicroStrategy purchased 4020 BTC for approximately $427.1 million, with an average purchase price of $106237. As of now this year, the company's BTC investment has achieved an annualized return rate of 16.8%. At present, the total holding of BTC is 580250, with a cumulative investment of approximately 40.61 billion US dollars and an average cost of 69979 US dollars.