Microstrategy CEO Michael Saylor recently retweeted his tweet a year ago and said that he did not sell any bitcoins he held.
According to previous tweets, he personally holds 17,732 BTC, which he bought at an average price of 9882 USD.
At the time, these bitcoins were worth 235 million U.S. dollars. At current prices, they were worth about 1.1 billion U.S. dollars, reflecting more than 500% of unrealized gains.