There are basically three altcoins that had gain imense amount of attention during 2017 bull run namely ethereum, ripple and bitcoin cash.

Ethereum = got massive pump and dump because majority of ICO failed to deliver their promises and legal bullshit around ICO
Ripple = unlimited supply and major periodic dump by corporation behind this centralized crypto
Bitcoin cash = bitcoin's fork trying to solve fee issues but at backend few crypto billionaires trying to print more money out of thin air/bitcoin holdings

Bitcoin is actually base currency in crypto ecosystem and it will remain like this in future too as number of adopters and marketcap bitcoin have is massive compared to others