Curve has now initiated a proposal to add a USDC/USDT 2pool in Snapshot, which will allow Curve and other protocols using Curve to reduce their reliance on DAI in the future. Voting will close at 3:01 on April 6.
Previously, Terraform Labs also released a proposal to launch UST, FRAX, USDC, USDT 4pool on Curve to promote the use of UST on Ethereum and other EVM chains.