1. I watch YouTube videos of people gambling on meme coins with just 100$ and making thousands of dollars, I did the same and I ended up with tokens that I can't sell on an exchange, buying works but not selling.
Yes it is true, that many people that follow YouTube to invest in cryptocurrency 99% always end up in nothing because many projects have paid for those videos producers to convince people that the project is a promising one and is going to 10x just get intentions of people,and the project team will now be also investing to pump to token so it can attract people more but last last they will remove their huge investment with profit and dump the token.
3. 100k per BTC nearly brainwashed me, I escaped this though but I really believed it, if I had some funds at the time I might have invested on BTC at ATH, thinking its going to 100k.
I don't think $100k per Bitcoin is a brainwash, but it just a time that have not reach, but I believe that the time is coming that Bitcoin price will hit $100k.the only advice that I can give about Bitcoin is hold for long periods of time and be patient enough, and with this you definitely make the profit out it.