As such, although anyone can mine Bitcoin from anywhere in the country, there are certain states that have been classified as preferable thanks to their affordable energy rates. The fees are high because Athena will work with you and walk you through the buying process with them and offers personalized help. Top up your mobile phone in the USA. BitStamp is one of the world’s largest and most well-known Bitcoin exchanges. This basically means that the price of Bitcoin or other cryptocurrencies is sold above the going rate. Another payment option for US customers is using a connected bank account. Visit CEX.