It's not about the value of the asset, but the psychology of the market, when trading crypto.
Actually, in a lesser sense the same came be said about gold and silver.
I have noticed that the charts of most cryptos are identical. That is the price may be much different (e.g., $40K/BTC but less than a quarter for Dodgecoin), but they move in almost exactly the same manner. Same percentage gains/losses. That always seemed off to me.