I agree with the fact one should hold literally forever. The thing is, big bubbles happen and the opportunity to x5 your BTC by selling on a peak is always there.. but who wants to risk it? you not only need to nail it when selling at a peak, you need to nail it when buying back on a correction.
Just maybe one day it'll hit its eternal September and those who thought they were heroes selling off to buy back lower end up looking like dicks when it don't. Everyone's a trading hero in retrospect and market behaviour is ingrained until it's not.
Everyone is optimistic so we should be like that.
But we also should be based on facts that are happening these times to bitcoin.
The price can go much much higher, but it is stuck there for a long time.