The problem with your crypto could actually be your private key

“The problem here, is that the private key - the most valuable thing you have - is stored on some server a company provides you, if not on the device you are using. In this way, you don’t really have control on your private key! The convenience of having a key made and ready for you might actually represent a big problem when talking of big capitals, as encrypted as it can be.”

https://hackernoon.com/the-problem-with-your-crypto-might-actually-be-your-private-key-klqs31oc