According to #Coincodex tracking of Binance trading volumes, the biggest gainer today is:
• $FIO (FIO/USDT) — up 60.36%, the top gainer by a wide margin 
Also noted from a slightly older snapshot:
• $PNUT (Peanut the Squirrel, PNUT/USDT) — surged ~50.5%, placing it among Binance’s most volatile assets