Bitcoin mining revenue reached the highest monthly total ever recorded in March, according to data compiled by The Block. 

Of March’s $1.75 billion total bitcoin mining revenue, $167.21 million (9.55%) came from transaction fees. In March, compared with February, there was a 28.7% increase in total revenue and 10.7% decrease in transaction fees. 

Daily mining revenue also reached all-time highs — around $60 million — on March 20. 

With so much money being made, demand for bitcoin mining hardware is so high that top-of-the-line machines are selling at five times the price at which they could have been pre-ordered in November.