If you buy a bitcoin in the price of 9000$, yes it may drop, but we have clearly seen that this is what it does. It goes up and down. If you have 1 million dollars and buy 100BTC (900.000$) then the only thing you have to do is wait. Because someday it will pass that number and you will have profit. Am I wrong?
With that amount of money to be use on investing, it is best to put only small amount for bitcoin and use some in mining instead rinking with that amount. So theres a win win because you can sell the Nvidia on some gamer.
Because you dont need to check how deep it is using two feets .