The price of Bitcoin has dropped around 7% ($20) today. This is a very sudden movement, as opposed to a gradual decline, so if we were to look for an astrological trigger I'd look for something that moves very fast like an inner planet.
The best culprit I can find is Mercury, now at 8 Pisces. Mercury is now conjunct transiting Neptune at 8 Pisces, and both are conjunct Bitcoin's secondary progressed Venus at approximately 7 Pisces. If this supposition is correct, the price will recover very quickly: in the next 24 hours.
I've mentioned in one or more previous posts that transiting Neptune conjunct Bitcoin's progressed Venus is a relatively long-term (maybe another year or so) factor likely to suppress the price.