Well, there is nobody that will predict the bitcoin price with 100% certainly because that is completely false. Nobody can ever predict anything with 100% certainty, even if the market capitalisation is as small as bitcoin's or even altcoins.

I personally do not think that bitcoin will crash to $1000 or sub-$1000 because right now the floor is $1,200 and the second line of defence is $1,150. To get to $1,000 would see some sort of big negative news being cast on bitcoin, or something really out of the ordinary which I don't expect to happen.

If you want to invest in bitcoin, don't worry about the short term variance. Simply put your bought bitcoin safely into either a hardware wallet like Ledger or Trezor, or in a paper wallet. Stash it away somewhere safe. In a decade or two you'll find your wealth grow exponentially.