Please don’t interpret the order in which products appear on our Site as any endorsement or recommendation from us. All Bitcoin transactions are tracked on a public ledger known as the blockchain , and people working as miners verify transactions and update the blockchain. The uncertainty associated with it, coupled with the fact that it has been in existence for barely a decade, means that many companies and stores have been reluctant to embrace it. Best for Quick and Easy Transactions: Coinmama. To find the fastest exchange, we looked at how quickly most customers can sign up, get verified and buy BTC. Regardless of whether you choose a US or overseas-based crypto exchange, make sure you compare a range of options before deciding which platform to use. To find the cheapest exchange, we looked at overall cost-effectiveness when buying BTC with fiat currency, including exchange commission fees, deposit and withdrawal fees, exchange costs and any other applicable fees.