This is the most common thing that i always read and saw here when the market drops.
1. People are panicking - a simple negative news and FUD cause their knees are shaking (panic)
2. Why bitcoin is dropping - This is the cycle of market pumping and dumping. This is how trading works.
3. FUD - this is normal the people are spreading this to buy cheap value of bitcoin.
The market will be expected to drop because of the pump that happened here and the last fluctuate of the value of bitcoin. I am not an expert on trading but i do know this usual thing to happen. This is normal the value of bitcoin won't be stable, if the value is continuous to pump and (there is no drop that happened bitcoin will be what you called bubble that will popup), so do not worry. Bitcoin will sure pump again after this dump.
