When it comes to memecoins, it needs to be mentioned: Most "Memecoins" are not even coins, most "Memecoins" are tokens.
Often, it is just a marketing move to designate a crypto asset as "Coin" but in reality, it's a token.
A coin is based on its own, unique Blockchain, like Bitcoin, Litecoin or Dogecoin
A token is based on an existing Blockchain, like Ethereum tokens (for most ICOs) or based on BNB (for many Memecoins).
And today, most "Memecoins" are not even coins, most "Memecoins" are tokens. Keep in mind when investing.