Its because this bullrun is different, money concentrated and only going to bitcoin. We can simply see the inflow of BTC and compare it to ETH.
BTC inflow on ETF is several folds higher than ETH despite ETH supposedly in a bullrun after pectra upgrade.
The fact that institutional money has become the integral part of this bullrun, the main mover also means these money hardly gonna go to some random alts, probably just limited to altcoins with potential of being approved for its ETF proposal.
Overall, don't expect much from alt but focuses more on BTC.