I do the same, but I'm not Michael Saylor, I still can't gather even 1 full coin. I understand why some people are excited, but it kinda worries me that 1 man has almost 1% of the total supply. I don't see it as something good.
you have to differentiate between an individual and a company. michael saylor is only a top official at microstrategy, there are several other top officials who have an interest and influence on the company's decisions. so if you say that michael saylor owns the bitcoin, you are wrong, the one who owns the bitcoin is microstrategy which was purchased with investors' and company money. so when michael saylor wanted to sell the bitcoin, he had to get approval from microstrategy officials and investors.
but it is possible that microstrategy sells their bitcoin in the future, as tesla did some time ago. however, it is possible that they did not sell all their assets, only a few percent to get a profit to develop their business or for other reasons, and that is very understandable considering that they are a company that is looking for money.