I would be very carefull when choosing a crypto bank. I did some research about Wallex and found out that it actually doesn't have the necessary licenses to act as a financial institution.
Aside from that I've looked into the Founder (Simone Mazzucca) and discovered some pretty dodgy stuff. Apparently he was involved in some Real Estate fraud in Spain. So I would say stay away from it.
There are many credible Crypto Banks out there, no need to risk with smaller ones.