People are taking advantage of #2 for the short-term. Guess that not everybody is fan of long-term holding that's why they're just joining the hype. Count meme coins for one on that.  I heard from one of my colleagues that they do not care if a random guy in Twitter just shill the crap out of it, as long as they get to profit from it in the end cause that's what matters for them.
For #3, that's a lot to cover actually since people just wanted to buy cheaper coins so that they can bag it for the holding, but they're not fully aware of what's to come.
For #4, do not rely too much into reviews as some of them are paid. There are legit reviews and there are paid reviews.