If bitcoin dropped its price to 1$ then i will buy 1000btc and hold them for twenty years, even if the price went up at 50 still i have a lot profit when i sell them all.
Well that's a good thing but you need to wait for almost 20 years before getting profit on it and you wouldn't if you are still alive that time or you
will still know the password of your bitcoin wallet.
But still, you will earn big profit from it.
That's still a giant profit for 20 years, and $1000 isn't much money for a $49,000 profit. Even if he isn't alive, tell your kids about BitCoin, will it to them, they'll be happy to have 1,000 BitCoin. By that time, we really won't need the USD.