Just how many fiat do u have if u can buy thousands of bitcoins @ double digit price? Anyways i doubt we will see sub 100$ bitcoin, and im not optimist when it comes to bitcoin price.
It will take many years for bitcoin to get to where you guys are hoping, if it doesnt die out or get replaced with something similar, but better made.
1000 $ seams like a safe bet, that could happen within 2 years again, so if youre trying to multiply your fiat, this seams like the best chance in terms of years of waiting and % of return

cheers