First of all, call the coins with their real names.
Bitcoin Cash is just an altcoin (bCash) not a Bitcoin v2 what so ever

Nor Bitcoin SV / BitcoinABC / BitcoinXYZ are the real bitcoin
We will always go with Bitcoin first then Litecoin , zCash and BEAM (seriously you guys should take a look over BEAM privacy)
Now.. if you are about the trading.. bCash is good for daily +-5% low balls
Should you keep your money on bCash.. definitely NO
"Why not buy something cheaper with chance of doubling in value in couple months?"
What "doubles" is low marketcap altcoins which are purely manipulated.
If Bitcoin doesn't double.. no altcoin will follow
Focus on privacy coins for long term.