A sharp weekend selloff in crypto led by a slump in smaller digital tokens set off a fresh wave of anxiety among investors, following a week in which a crackdown by the U.S. Securities and Exchange Commission on the sector gained significant pace, Bloomberg News reported. Altcoins including Cardano’s ADA tumbled as much as 25% on Saturday before paring a sliver of the decline, while tokens including Solana’s SOL, Polygon’s MATIC and Avalanche’s AVAX posted double-digit percentage drops. Bitcoin, the largest digital asset, was down almost 3% as of 4:15 p.m. in New York. Second-ranked Ether earlier shed more than 6% to hit its lowest level since late March. The crypto market is notorious for big swings during weekends, when activity is typically thinner and even small trades can make an impact. This time around, investors were already on edge after the SEC launched lawsuits earlier in the week against market leaders Binance Holdings Ltd. and Coinbase Global Inc., and flagged a throng of altcoins as unregistered securities, including SOL, MATIC and ADA. “Altcoins have been in the spotlight” ever since the SEC categorized some of these tokens as securities in recent lawsuits, said Gordon Grant, co-head of trading at Genesis, in an interview Saturday. “Coming into this weekend, as we got to that witching-hour time, these alts suddenly came under fire.”