However, there are several platforms where you can exchange one cryptocurrency for another without needing to verify your ID. The buyer and the seller are free to carry out any number of transactions and any amount of transactions. Although Bitcoin wallets and exchange sites ensure excellent security, it is always preferred to store your Bitcoins in a hard wallet or a paper wallet. Why do some people not want to buy if there is a need to upload an ID scan? Ask an Expert. It is because of the risk of exchanges being hacked. In fact, some crypto wallets allow you to complete the exchange of coins within your wallet, saving you the hassle of transferring your coins to a third-party exchange.