What would make him sell his Bitcoin? This is someone that has a lot of money to spare and if he invest in Bitcoin he doesn’t care whether the price is going up on or down. So, he’s definitely going to keep his investment rather than selling it, because that is definitely going to worth more than it is today in the next few years to come.
And even in the next few years to come if he shouldn’t see the need for him to sell it because he has a lot of money, then he’s still going to continue holding his bitcoins as part of the assets that he owns rather than just selling it. I also don’t have any plans to sell all my bitcoins, although I did sell part of it to take profit when the price was high.