Put 100% into bitcoin. Everything else is garbage.
I second that, but quite a lot of altcoin investors would disagree, they will bring up some success stories of how people made X amounts through investing in altcoins, forgetting about the multitude that became bagholders or were caught up in a pump and dump scheme, or a rugpull, etc. It is safer for newcomers to buy only bitcoin, and if they understand the network well enough later on, they can gamble with altcoins if they so desire.
Agree or not it's also about how everyone makes their choice to go fully into Bitcoin or diversify to spread their assets so that when the bullrun arrives there are a lot of profits to be gained.
Knowledge about crypto is indeed necessary for crypto investors, if they are beginners who are just entering, 100% bitcoin is indeed the first choice,
but don't be too stupid to get caught up in the FOMO that occurs without determining where to enter and how much to buy and hold as a reserve.
Now that there are more altcoins and junk coins popping up every day, it is just a matter of choosing whether to earn a lot of money from memecoin gambling or choose to find a safe way with 100% bitcoin, It's each person's choice.