You should make a separate thread about proof of stake. It’s not very helpful to simply state that Zcash should switch to proof of stake when we’re debating ASIC mining vs GPU mining. Even if Zcash does switch to proof of stake, that would probably be at least a year from now.
Anyway, GPU mining is a lot less risky than proof of stake and is easier to set up for many people. Proof of stake forces you to become a cryptocurrency speculator, while GPU mining allows you to hedge your bets.