There are several wallets that are suggested, and depending on the currency you need to store, some have an advantage in that they have an exchange built into their platform, and this is one of them.
Completely anonymous, you only need an email address to register, and it works with all of the major crypto currencies, including Bitcoin, Ethereum, Dash, Litecoin, Zcash, and others. You can swap them using their exchange, which is fast and commission-free.
The security procedures are quite trustworthy.
One of the criticisms I found was that the technical assistance was allegedly inadequate, and another was that it was a wallet with custody.