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Their biggest drawback is the founder's rewards,and the anonymity,this coin is over hype,zcoin is a much better version I prefer the later than the former..
Soon this coin will lose hype and we will see it's real value.
but from other pespective that makes + go zcash becouse they have bigger motivation to work hard.
Everywhere is problem with funding and here is solved some way.
Sad part is that will centralize coin hard around certain people.