I personally like Zcoin and NULS.. Zcash is probably worth it but it might would have been a bit better before the coinbase mini pump in anticipation of them listing it. If we enter a full market cycle I think Zcash will do quite well, so it probably is worth it.. but be willing to commit to it if it doesn't since masternodes basically require you locking up tokens for the duration of the gain period.. so stake coins you like.. not because or ROI.