You can't eat your cake and have it too: Either you are the only party controlling access to your accounts – which then necessarily includes the possibility of losing everything – or you don't, in which case somebody else does.
This isn't a tradeoff unique to cryptocurrencies: Cash works exactly the same way (qualitatively, if not quantitatively, in terms of the risks of losing access to it) – if you store your life savings under your mattress, they can be stolen easily or burn down together with your apartment.
