Democratic Senator Elizabeth Warren is calling on Congress and the SEC to take a more assertive stance with crypto, in light of recent high-profile insolvencies from lenders like Celsius, Vauld, Voyager, and BlockFi. 

Warren told Yahoo Finance on Monday that “Congress needs to act, but the SEC has a responsibility to use its authorities to put guardrails in place and crack down on crypto actors that break the rules.”

The Massachusetts Senator said she’s been “ringing the alarm bell on crypto” and recommends enforcing “stronger rules” on the sector to ensure customer funds are protected. 

She added that “too many crypto firms have been able to scam customers and leave ordinary investors holding the bag while insiders make off with their money.”

Monday’s comments are just the latest in what has become a highly critical stance on all things crypto.

Warren on mining, DeFi and Bitcoin retirement plans 

In December last year, Warren wrote a stern letter to Jeff Kirt, the CEO of Bitcoin mining company Greenidge, raising concerns over the operation’s “high energy use and carbon emissions,” which, she argued, could harm the environment and raise the cost of electricity for ordinary consumers.  

Later that month, speaking at a Senate Committee on Banking, Housing, and Urban Affairs, Warren called the fast-growing decentralized finance (DeFi) sector “one of the shadiest parts of crypto.” 

She elaborated that DeFi “is where the regulation is effectively absent and—no surprise—it’s where the scammers and the cheats and the swindlers…