USDT and USDC have announced that in the future, their tokens will be used for payments only on their own networks, and that fees will be charged exclusively in their tokens.


USDC issuer Circle to launch new layer-1 Arc blockchain this year

https://cointelegraph.com/news/usdc-issuer-circle-layer-1-blockchain-arc


Tether creates ‘Stable’ blockchain built just for USDT economy
https://coingeek.com/tether-creates-stable-blockchain-built-just-for-usdt-economy/


This is likely bad news for most altcoins like Ethereum, solane ,Tron, BNB, and others, since people mainly use them for tokenized dollars