Hardware wallets are a more secure bet for your bitcoins, especially if you’re using them as an investment instead of spending them. The difference is that online money is fiat money denoted by online codes such as numbers, etc. Paper Wallets Paper wallets are interesting. You’ve likely heard about all of the risks before; it’s incredibly volatile. The company isn’t as high on the cryptocurrency as it was back then, but there are still ways to buy bitcoins with PayPal. Car Insurance.