If they are so convinced of this high price, why sell the position.
Some (especially those with several billions or even trillions) might avoid Bitcoin as a currency with public information available about two people owning ~1% of it knowing they bought "low" compared to the current exchange rate and they might need some money to get their IPO started. It simply can't go or at least it won't stay at $40,000 with a wealth distribution like this greed and the risk of someone dumping 1% holds it down that's why you diversify
That being said: I think their intentions are good.
Yes, this another major problem for bitcoin,
however they cant solve it, as they are tiny in comparison to some other early adopters. We already have a huge one sided distribution in favor of early adopters, who hold over 50% of the bitcoin supply. This design was built in on purpose,
Satoshi himself doesnt seem to mind otherwise he would have designed it differently. Again I find it peculiar to say the least, that they are so convinced of the $40000 price tag but already want to dump.
To me the explanation that they just want OUT is more straightforward than what you point to, as they cant fix the design flaw (if they think distribution is one).
you do realize that is how all long term investments work right!? the early adopters are the ones that put up the most risk and are the ones that benefit the most if the investment grows. Thats why there are people that become early adopters for higher risk and once the company/website/crypto coin becomes too mainstream they sell and move on to the next big hit. You could then technically say any investment, even a start-up company, is a "ponzi scheme" where the earlier investors make the majority of the money in the long term. How dare people buy in early to grow an investment!