A golden rule in investment is diversification. There is always the risk that you lose money, and that is even more the case in crypto. If you put all your money in a single coin, and that coin happens to lose all its value, you're basically rekt.
But diversification doesn't mean buy every coin in the market. As always, do your research, and find the coins that are the most potential to grow in the future.
Indeed,keep rearching and learning that is one of the things that i learned in entering in the world of cryptocurrencies,even if we have so many altcoin if what we are all holding are the coins that has no value we certainly cannot make some fortune in there so for the beginners what they should do is to have proper knowledge about the coin they were taking.Diversify their holding in a more profitable way.