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..

Its better to find out the reason why bitcoin price went to bottom rather then investing in it blindly, and if there is no scope of going up again then it will be waste of money to invest in bitcoins.
Yes that would be the better idea if bitcoin fell to the bottom, we should find out what would be the reason of dramatically falling in bitcoins price and then we would be able to know what to do next in such a shocking situation likes this. And if bitcoin ever dropped to that level then it might have been because of something more serious so it wouldnt be so wise if you invest as much as possible in bitcoin when youd have no idea whats ahead.