Eye Wrote: There are dozen of different crypto currencies, the safest to invest are probably BTC and Eth. Ethereum is getting really popular, and BTC is being more and more used as a payment method in many different places (Even on Steam, you can already drop money on your wallet). So, even if BTC is already in 11.5k$, I believe it will go way upper, even if it has some crashes.
This.
Any other crypto currency is pretty much not gonna take over at this point.