thats the time im gonna buy thousands of btc's.. hold it for years then sell it when bitcoin's value will reach 1k$ each..

Wont that be a really foolish decision just to buy bitcoin when it crashes to the bottom without finding out if what is the reason behind that? Because such a big crash can only occur if their would be a really big reason otherwise bitcoin does not seem to be weak enough to break that much.
Provably there is no reason that the price will crash to the bottom but if it can be happen and investors seen it they will buy again a lots of bitcoin but depends in situation if entire blockchain was hack i think almost all people will not buy bitcoins again the rest price if we seen the price crash to bottom i think the rest is old holders that they didnt know the password of their wallet or they dont know the reason why bitcoin price fall..