imagine all those people who sold Apple, Microsoft, Amazon in the 1999 bubble. I bet they own those stocks again, probably cashed out and bought a lambo, only to buy back the shares at double to even 10x the price. will the same happen to bitcoin?
An investor will remain as an investor.
Those who have sold can buy back with their profits gained and in the long run, they believe that those stocks can go in a bull run again or at least get a bubble.
And for bitcoin, not very new. We buy, hold, sell and buy back at lower price.