You should mostly do BTC,ETH for a stable growth its not x200 but they wont scam you and they are a safe pick. But you could always go 10% or less on altcoins to to play around I use some of my crypto for sports betting and casinos. Im not hooked on gambling but i like to try my luck from time to time xD. Im currently using Roobets, but im waiting for Lunabets to launch, their UI looks better, but ill see after i try it.