I think that the Feb 6th low is the low for 2018. I typically look at the GDAX exchange and the low was 5873.

Looking at a chart, it spiked low to the descending lower trend line for a V bottom
Looking at a fibonacci retracement from July low to the high of 19.xk, the pullback reached the 23.6 level. (retraced -76.4% after the peak)
The previous 3 years, the low was in January. This year it may be in February.

I think many people that are new to these markets think it is easy to make money because BTC and cryptos in general run up quite fast. I also think a  lot of people want to make easy money trying to trade BTC. While it is possible, it is also quite hard as the reversals in price both up and down are very quick.

Technically, if BTC does NOT take out the last low on Feb 6th, it is still in an uptrend.