Seek for more crypto knowledge before investing in new projects, it's not always that easy to choose, as a newbie it's better to stick with old top altcoins on coinmarketcap, why? Because many newbie are in rush to make fast returns, if you are this type pls go for better top coins, 90% of new coins aren't serious at all, they are here to steal money from investors and give fake promises in return
Newbies are safer with top altcoins until they start learning how to choose wisely, do better diggings on new project to avoid scams
Cov-19 have been used to scam many newbies and even Corona virus coins are built too which have no real use cases
Play safe and be willing to learn
Currently there is no difference between altcoins and coins that are in the top 10, the condition of the coin in the market has actually decreased in price for now, so all coins are worth buying in such conditions, but if you are just starting out or are still a beginner, then buy altcoins are a process of learning to know more about cryptocurrencies, so that when the risk is there, you will slowly get used to how to solve the problems caused by the risk.
I guess unlock all coins worth buying, have to go through research first. especially for beginners, of course it will be safer to invest in the top coins that have a large market capitalization, because the development of cryptocurrencies seems to rely on bitcoin