Ethereum’s ERC-20 tokens[rr] are quite powerful. In fact, you can actually create a whole new cryptocurrency with these tokens: you just need a smart contract to hand out a limited number of tokens to users. Then, as long as there’s someone willing to exchange your tokens for ether (or dollars) and vice versa, you have a scarce asset that can be traded around and can be converted to or from other forms of money. In other words, you have a currency!
