I will keep holding until i see that future holds nothing for crypto, then I can think of selling. And before that time I am sure 80% will have already opted out. Currently i still see that future is bright for crypto currency and there is no need to panic
Even if you wanna sell now, this is pointless cause assets have a 70-90% loss. As a matter of fact, coins cost nothing, and if the correction will last long, many projects will die! It's better to take care of the portfolio!