With all due respect, you have no idea what you are talking about. Saylor has repeated ad nauseam that he will never sell his bitcoin, referring to MSTR, other than that he also personally holds them and will not sell them. But it is not only that, he has based the value of his company on never selling and never stop accumulating, so if he were to sell (leaving aside a small sale at the end of the year for tax purposes, as you mention) it would automatically mean a drastic drop in the share, and he is not going to stick a thread in his foot.
At the moment the plan is to get $42B the next 3 years to keep buying more bitcoin.
that sounds like a really ridiculous strategy despite the good notion of keep holding it and not selling it at all.
wonder what's his plan after accumulating that big amount of BTC to be honest, will he create some sort of services or what.
because in my opinion, the money need to be cashed out at some point to pay up the loan, which is in this case, if he's so sure he won't sell his BTC, he probably needs a strategy to profit big time from leveraging their BTC holdings.
Who would be able to tell when his BTC is moved, or there are his address at place to watch and learn how it's done?