I checked the spot trading pairs of Binance USDT and found that the overall trading volume of altcoins hasn't really increased. Most are just floating with the wind and completely out of sync with the market atmosphere.

Retail investors may have been trapped in altcoins for too long and with too much, having little money to invest or lacking the confidence to chase;

Many altcoin market makers are also very cautious, not letting loose, fearing being caught off guard...

Mainstream active (this mainstream refers to mainstream coins, not altcoins) funds have not overflowed.