Yes Idea of cryptocurrencies to give full control over our assets but the problem is with that there is no proper way to transfer or give inherit if the holder dies or something happen to him which is a big problem at the moment because holding Bitcoins or any other currency means very valuable and for a person to earn such asset required hard working so there should be a proper formal way he can transfer those assets to his children or any other relation in an emergency situation and that is why crypto banks are essential for people who real need