A clear indication that a bear market is underway and people are more fearful of altcoins, leading more investors to store their money in stablecoins. The rise in stablecoins indicates a decline in confidence in the altcoin market. Emotionally, this is true, as I also have similar thoughts. During periods like this, it's better to hold USDT to avoid volatility, while exploring potential in other altcoins.
ETH has begun to lose its holders because they weren't particularly enthusiastic about the previous cycle, and this could also be a trigger.
The market has lost its steam, nothing of significance is going on and to be blunt, altcoin market is running on hype.
It's no wonder that everybody is holding stablecoin instead. The first time altcoin lost its hype, people will convert it all to stablecoin due to lack of opportunity.
Maybe when altcoin become hype again that people will start coming back to altcoin.