Bitcoin falls back from its all-time highs — Here’s what four experts are watching

Bitcoin dropped as much as 17 percent on Thursday, briefly dropping below the $30,000 level. The digital currency had been on a tear up until two weeks ago, climbing over $40,000 on Jan. 7. But it’s fallen more than 12 percent so far this week and is 25 percent off its all-time high. Here’s what experts are watching now.