Bitcoin fell to $32,601 at 1800 GMT (2 p.m. ET), losing $4,899.54 from its previous close. It hit a high for the year of $64,895.22 on April 14.
Bitcoin had been under pressure after a series of tweets last week by billionaire Tesla Chief Executive and cryptocurrency backer Elon Musk, chiefly his reversal on Tesla accepting bitcoin as payment.