I think this is legit insider FOMO. I watched one video from youtube that analyzed bitcoin price and it claimed that this is a B-wave up-run that sometimes happen in a bear market. Back when bitcoin bottomed I felt like it absolutely must be bottom and others must have felt that too, and now they are buying btc like idiots. One reason why I don't believe this to be a sustainable uptrend is because the alt-coins have not made gains enough for this rally to be considered coming from entering investors, but rather just old ones buying back or exchanging their alts.

Here is the video: