Is there any wallet that's also offering trading or something like that?
blockchaininfo wallet comes in with builtin exchange so you can buy and sell bitcoin and ethereum with in the wallet itself,but all the exchanges will alows you to store the coins where you can trade your crypto currency.But a wallet with a privaate key access don't have trading option(I think).So you need to be clear with your topic you are searchong for a wallet or an exchange.