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.
Where did you get this number? It seems difficult to estimate the amount of Bitcoins that has been destroyed permanently and to see how the distribution of Bitcoins on exchanges and other services breaks down and how addresses belonging to the same person are connected
Of course: if your money is on an exchange it's technically a single place in control of it