Wall Street warns stablecoins pose $6.6T risk

TLDR

Wall Street banks are warning that, under certain rules, stablecoins could grow large enough to threaten parts of the banking system with a potential $6.6 trillion shock.

1. The $6.6 trillion figure comes from Wall Street advisory analysis modeling how much bank and money market capital could migrate into yield?bearing stablecoins.
2. Todays stablecoin market is roughly $300320 billion, so the warning is about a possible future scenario, not an imminent $6.6 trillion hole.
3. The key battle is over regulation of stablecoin yields and reserves, which will decide whether this risk stays theoretical or becomes a real stress point for banks and short?term funding markets.

Deep Dive

1. How Wall Street Gets to $6.6 Trillion

A Treasury Borrowing Advisory Committee made up of senior Wall Street executives warned that, with favorable regulation, dollar stablecoins could scale to about $6.6 trillion, rivaling money?market funds in demand for Treasuries and deposits. That analysis argues that if issuers and platforms can offer competitive rewards on stablecoin balances without full bank?style rules, deposits could migrate out of banks at massive scale, then rush back in a stress event, destabilizing short?term funding markets and bank liquidity, similar to a run in money?market funds. This view is reflected in discussion around the stalled CLARITY Act and related policy debates on stablecoin oversight.

2. How Big The Risk Is Today

In reality, stablecoins are currently a fraction of that size. Recent analysis puts total stablecoin market cap a little above $320 billion, roughly 1.5 to 2 percent of the roughly $19 trillion US commercial bank deposit base, and growing steadily rather than explosively. The White House Council of Economic Advisers has argued that banning issuer?paid yield on payment stablecoins would only raise bank lending by about 0.02 percent and may even impose a net welfare cost, implying they see the current systemic risk as modest compared with banks worst?case claims.

3. What To Watch As A Crypto User

For crypto users, the fight is less about whether stablecoins survive and more about who captures the digital dollar economics and under what rules. Draft US frameworks like the CLARITY Act would require 1:1 high?quality reserves and could ban issuers from paying direct yield, while regulators debate whether exchanges and wallets can still offer rewards funded from reserve income. Internationally, regimes like MiCA and Hong Kongs licensing rules already tighten stablecoin oversight.

Conclusion

Wall Streets $6.6 trillion warning is a stress?test scenario meant to influence how stablecoin laws are written, not a description of todays market. For now, stablecoins remain much smaller than the banking system, but upcoming rules on yield, reserves, and who may issue digital dollars will determine whether they become a manageable complement to banks or a genuine source of funding?market stress.