hummm... no offense but that does not make sense, people had many chances to sell when the price was too high and fell a lot, why would people wait months before the price drops to $ 6000 to sell? does not make sense, see there is still good news for the future so I again ask: why would people sell for $ 6000 when they could expect the price in the future to be higher? when price falls it always has theories about the cause of the price fall
It makes sense, some of them are scared that price could fall further down and they just want to ensure to get they investment back with some profit. If you buy at 4000$ and price is very close to that point with great possibility to fall below that point, would you sell or hold ?
I do not know about what good news for future you are talking about, nothing big is not on the horizon - a sure thing that will surely happen is halving somewhere in the middle of 2020. Maybe people are counting on ETF, but this is something totally unpredictable and it may take years to become a reality. The rough reality is that long winter is knocking at the crypto door, some people flee to
warmer assets for the time being.