When examining the valuations of altcoins, we can see that many of them are experiencing increased activity. For example, the trading volume for Optimism against Bitcoin is currently rising, indicating strong interest and accumulation in this pair at the moment.
Duh, don't look at OP news that much, but I do think it's obvious it's because of the whole sentiment on the market - everybody tries to win the game and get the most out of this cycle.
And the pusher currently is Bitcoin - its rally isn't over yet.