Meme coins very popular now. Big price growth attracts many people. People buy meme coins hoping that the price will grow in future.
Also meme coins are used for trading and speculation.
Because meme coins are very popular they are very actively use for speculation.
Many trades trade meme coins because of their volatility.
Meme coins raise even more than other coins and tokens. But when cryptocurrency market falls meme coins falls more too. Meme coins are very volatile.