Tried doing it on kraken lately, its not easy to simply just buy and sell bitcoin really.
Kraken has strict verification policies for its customers. But, till you are sticking within digital currencies, you will not be required to submit them any of your documents, just email verification and mobile verification are enough. Kraken must be a right choice for high volume players.
To get the best of your investment, you maybe simply required to wait for some longer time. It is always proven with bitcoin investments.