Brazil proposes a ban on stablecoin transfers to self-custodial wallets to tighten financial market oversight.The regulation could push users towards decentralized platforms and peer-to-peer trading for stablecoin transactions.The Central Bank of Brazil aims to limit the flow of stablecoins to wallets like MetaMask as part of their effort to control foreign exchange markets.The proposed ban may increase the acceptance of decentralized finance solutions, challenging regulatory enforcement further.