Here the news about the vulnerability Monero:
https://getmonero.org/2018/09/05/a-post-mortum-of-the-multiple-counting-bug-2018-09-05.html

Found a critical vulnerability in Monero, this vulnerability applies to all currencies similar in structure. Until developers fix, all coins will not be available for input and output on exchanges. It may take months, it all depends on the qualification of the developer.

The project is interesting, let's push the guys, rather go to the exchange!