Honestly, while looking through DEX data today, I came across Curve Finance: $726 million in 24-hour trading volume, about 2.4 times its usual level, putting it at No. 5 among DEXs.
I'm generally pretty cautious about DEX trading data. I've seen daily volume surge several times before, only to find the next day that it was driven by hype around some popular small-cap coin or by arbitrage bots washing trades. The volume usually fell back to normal after a couple of days. So this time, I'll keep an eye on the data for $CRV over the next few days and see if it holds steady.