I'm not surprised, always had a feeling the market will take some hitting before crossing the $12k price mark, just like some weeks back when the price was trading below $10k and it looked like it'll take forever before it crosses that prices especially as the market crashes in each of its previous trys before it finally succeeded. The market has been very bullish lately which make it very easy for manipulation from the whales and that's what is likely happening now.
Just a matter of time before we can see that decline, that parabolic rise is not sustainable.
The market doesn't have enough support to cross $12k so the crashed was expected, read some technical analysis about the crash likely taking the price downwards to around $9.5k - $9.k but I don't think that would be the case as bitcoin currently seems to have a strong support at $11,100.
It's because we have exhausted, if we are going to look at the TA, $11,500 should be the resistance, but we have broken it, get to $11,800 but that is the last straw. So I would say that this is to be expected. But this is a healthy sign because we don't want a continuous growth, not at least at the end of the year.