The purpose is very obvious, we buy altcoins for the profits. I exclude XRP, meme coins, and stablecoins. I only choose potential altcoins such as ETH, BNB, SOL, MATIC, ADA, or DOT. I have experienced to gain profits from these altcoins in the last bullrun season (in 2021). According to may experience, the price increases of some altcoins can be more significant than Bitcoin. I think you know very well about this.
It is not a fake issue that their prices can increase more than Bitcoin. Although not all top altcoins may experience it in the next bullrun season.