if you have no Idea what Diversification means mate then better to check it because it has been said many times before and even now that we must not put all the eggs in one basket even if it is Bitcoin.
because there are some altcoins that has a growth/dump without following bitcoins movement and those are the coins we must find out and invest for better result.
Diversification doesn't need to be a thing within crypto world, it could be a good idea outside of it but doesn't mean I am going to do that neither. What ı mean is, when you want to diversify, you don't have to do; bitcoin, ethereum, bnb, avax, matic, sol. That would be diversification as well but that is within crypto and you don't need it, because bitcoin is already doing all the good that crypto could do, I would suggest just bitcoin is already enough.
However, I would understand diversification as in some of your money is in stocks, some in gold, some in crypto, some in real estate, that way you actually do diversify and that at least has a meaning to it.