Pools currently deployed on Curve are backed by centralized or decentralized stablecoins, wrapped tokens – such as wrapped bitcoin – or a basket of various assets. 4pool, however, will bring together UST and FRAX, the two largest decentralized stablecoins with a cumulative backing of over $19.6 billion, and USDT and USDC, the two largest centralized stablecoins, with a cumulative backing of $133 billion.