As one of the three largest cryptocurrencies in the world, investors can trade ethereum easily on fiat exchanges. Gas Ethereum Gas is the pricing value required to conduct a transaction or execute a contract on the Ethereum blockchain platform. C2C platforms take a longer amount of time. Bitstamp is one of the older cryptocurrency exchanges and has been around since Only a legal professional can offer legal advice and Buy Bitcoin Worldwide offers no such advice with respect to the contents of its website.