All cryptocurrency that aren't Bitcoin are called altcoins therefore the establishment cryptocurrency are also called altcoins. Not every altcoins are good investment, most of them are shitcoins that'll only make you to be losing money. There are some altcoins that when they get launched, they're already overpriced due to over hype and you buy at a loss due to the price always falling. Examples are memecoins as many of them are getting launched at high price then they start falling continuously.

If you're lucky you can buy an altcoins that'll give you big profits, altcoins is a risky investment but we have some good ones that's giving Investors profits. Any altcoins that's not trading on a reputable exchange isn't a good altcoins to buy unless the altcoin is just getting launched and the developers have good roadmap and plans to list them on good exchange to increase the liquidity of the altcoin in the market.