You can do that by adding money directly into your account , or just wait until someone sends you money with Cash and then use that to buy Bitcoin. Filed to: Bitcoin. How do I process a payment to someone or send to a coinbase..? If you plan on holding onto your Bitcoin for a while you may want to keep it somewhere safer than your Square Cash account. Try a higher quality scanner or camera or with a camera try better lighting. I was very glad to receive a prompt answer to my question, however I still would like to know what is the maximum Bitcoin amount that can be stored in your cash app wallet? Honestly though, Square is fairly focused on being BTC only at the moment.