The Cardano stablecoin proposal of 39,581,482,861 refers to the proposal by Cardano founder Charles Hoskinson to convert $100 million worth of ADA in the treasury into the Cardano-native stablecoin USDM. This proposal has multiple significances:

Enhancing ecosystem liquidity: Stablecoins are an important foundation for the development of DeFi, and the proposal aims to increase the liquidity of stablecoins in the Cardano network, which helps to promote trading, market-making, and other activities within the ecosystem, increase the network's total value locked (TVL), and drive the development of decentralized finance.

Creating economic returns and capital circulation: This proposal includes a self-sustaining economic model, expected to achieve an annualized return of 5%-10%. The returns will be used to purchase ADA from the open market and return it to the treasury, helping to reduce the circulating supply of ADA, expand the treasury size, provide ongoing support for the ecosystem, and create a virtuous cycle of capital.