Kinda hard to find a good multi wallet, there might be some but like people mentioned above it is scam, it has some bugs and there are some that you're not owning the private key. So for those reasons i think you should using single wallet instead of using multi wallet. I personally using single wallet i know that it is not simplest you have to own each wallet for every single coin that you want to hold but at least your coins will be safe, for small amount i stored them on trusted exchanger like poloniex and bittrex.
yeah i figured that some wallets are a bit dodgy. it's not about thousands worth but i would still not like to get scammed