BTG is similar to bitcoin cash, but it is part of the pre mining, so I don't recognize this coin, still relatively optimistic about the long-term bitcoin cash.

I guess you don't believe in any coin other than BTC and LTC. BCH is simply a copy of BTC.
Nearly all other coins are a pre-mine or on top of a pre-mine.
Some people just don't understand how business models works. They see the word premines and totally freak out...