Altcoins have disappointed a lot. Did you see bitcoin go below 1k USD in price? But here with altcoins, you see them dip below their starting price and just keep going further down. I have had $245 worth of coin dip to $0.72cents worth. Altcoins are not safe for investing.
You're partially right because the altcoin market does experience dip in price but the altcoin market does not disappointed by any means because the crypto market as whole is currently in manipulated vicinity and the altcoin market are know for being quick in respond to manipulation