They should lock him up right now and throw away the key, he's doing it again:

https://finance.yahoo.com/news/jamie-dimon-lays-bitcoin-again-095759488.html

Like the previous posters mentioned, it's never too late to buy BTC. If you look at the longterm trend, growth is certain for sure, so it'll make you profit either way. It's just a matter of when you join the game.