As of January, there were 28,185 bitcoin ATMs in the United States, according to an independent research site. Roughly 10,000 came within the prior five months.
Some machines only spit out bitcoin, some allow customers to invest in other digital currencies. Few of the bitcoin ATMs offer cash.
Fees range from 6% to 20% of a total transaction, said Pamela Clegg, director of financial investigations and education at cryptocurrency compliance firm CipherTrace. Fees vary depending on the location and Bitcoin ATM operator.