Many will promote some kind of crypto but never often admit or tell you they got paid money for doing it such as like $10,000 plus some free coins from it to try and get them to promote it so you buy unfair it's rubbish
Even a small influencer can get paid like $250 to like $1000 to promote just one currency so be aware if someone calls themself a Crypto Expert or currency master who if you can do research and check their wallet it does not contain much of the currency they promote it's fairly likely not something you should invest in unless you are willing to lose big money overall.
Many of these people have no investment knowledge outside of big a son or daughter of someone very rich is normally connected to it or they had no serious work to become knowledge about it does not help much as well. https://www.epintoken.com/2022/09/are-nft-scam-or-not.html
The real Crypto Whales don't promote themselves or run channels in most cases claiming to be a expert since they will not want competition and if you make big money wise run a course doing it why not just keep the money yourself instead of selling a course about your made up skills ?