US cities where you can spend bitcoin and find bitcoin ATMs. Digital money in cryptographic form are transferred between electronic wallets. What’s a fact though, that your money today will lose value. The basic principle of what money is and how it’s used money has thwarted change since money was invented. The more there is in the system, the less each one is worth. They are considered to be types of assets, which may be worth more tomorrow. So whoever wants to change the records, needs the original keys.