Until the GUI wallet does not work correctly, and dev refuses to fix it or even comment on that issue, this coin is not worth any serious investment. There could be another "implementation of Zerocoin" in no time with a more ambitious developer ... just saying. Remember my words.
How about you have a listen to the dev before you complain about a wallet.
https://letstalkbitcoin.com/blog/post/the-crypto-show-with-gary-le-of-zcoin