I think, i hold just Bitcoin, Zcash and now Steem ;-)
Slushpool is the first big pool in the world. We choose just Zcash after the big fail with namecoin. No other Coin. Bitcoin and Zcash only. And i do trust my slushpool friends :-) We are konservative.^^
And @ this time you can see the mining of Zcash on Slushpool grow bigger every day.
35 MH today.
20.08.2012
In January there was just 2 MH. ;-)
Miners love the zk-snarks protokoll.
It will chance a lot on this world.