In terms of being your own bank. It is not sufficient that you just have your own private keys stored somewhere on the internet. In cryptocurrency, there are also problems occurring similar to banks where people can have their money stolen. For you to secure your funds, an offline wallet is a must especially if you are to store thousand dollars worth of cryptocurrency. This
article can help you in choosing which hardware wallet suits you and we'll help you up to set up your own bank.
Thanks for referring me to the article, but I have a decent understanding of how to keep the coins secured, and I also own a ledger NANO S. What I am referring to is the financial systems, and how they are monopolised badly by banks in the current state. Indeed there are flaws in the existing blockchain ecosystems also, but they can be worked upon.