Tech Bitcoin tops record $19,000 on one exchange, then plunges in wild 2-day ride December 7, 2017December 8, 2017CNBCComments Off on Bitcoin tops record $19,000 on one exchange, then plunges in wild 2-day ride Bitcoin rocketed higher, briefly crossing the $19,000 mark on one exchange less than two days after topping $12,000 for the first time.