The Financial Crimes Enforcement Network withdrew two proposed regulatory rules targeting unhosted wallets and crypto mixers on Sunday, marking one of the most significant reversals in US crypto oversight since the Trump Administration took office. The bureau cited concerns over legitimate activity and explicitly framed the move as part of the administration’s deregulatory agenda.
FinCEN’s decision kills regulations that would have imposed reporting requirements on self-custodial wallets and sought to curb the use of privacy-focused mixing services. The rules had been floated during the previous administration, drawing fierce opposition from industry groups and privacy advocates who argued they would stifle innovation and punish law-abiding users for the crimes of a minority.
A Reversal Years in the Making
The unhosted wallet rule, first proposed in late 2020, would have forced exchanges to collect and verify identity information for transactions involving self-custodial addresses above a certain threshold. Critics pointed out that the proposal conflated the existence of a wallet with criminal intent, a category error that threatened to undermine the basic architecture of decentralized finance. Mixers, meanwhile, have been in regulators’ crosshairs for years, with Tornado Cash sanctions in 2022 setting a precedent that many feared would extend to a blanket ban on privacy tools.
FinCEN’s acknowledgment of “legitimate activity” is a notable departure from the zero-tolerance posture that characterized much of the Biden-era enforcement approach. Mixers aren’t only used by North Korean hackers and ransomware operators; they’re also tools for journalists, dissidents, and users in authoritarian regimes who need to shield transaction history from surveillance. The question was never whether bad actors use these services, they do, but whether the government could regulate them without gutting privacy for everyone else.
What This Means for Enforcement
The withdrawal doesn’t mean FinCEN has given up on combating illicit crypto flows. Existing anti-money laundering frameworks still apply to exchanges and custodians, and the Treasury has other levers at its disposal, including the Office of Foreign Assets Control’s sanctions authority. What it does mean is that the government won’t be mandating surveillance at the wallet level or preemptively banning tools based on dual-use potential.
Whether this shift holds depends on how the Trump Administration staffs Treasury and what comes next from Congress. Regulatory pullback at the agency level doesn’t guarantee legislative restraint, and a future administration could easily reverse course. For now, though, the signal is clear: Washington is stepping back from the most invasive proposals it floated over the last four years.
