Stablecoin is becoming more competitive in this space, but the focus has shifted. Previously, everyone competed to see who could more stably peg to the US dollar; now, the question is where the returns come from and how users can fully exit if problems arise.

Falcon Finance has laid out this logic clearly. Users deposit assets to mint USDf, an over-collateralized synthetic USD; then they can put USDf into an ERC-4626 vault to earn sUSDf, generating yield. Essentially, there are two actions, but each step's risk points are transparent and exposed.

First, let's clarify the token roles. USDf is a synthetic stablecoin produced through over-collateralization; sUSDf is a yield-bearing receipt obtained after depositing into the vault, and its exchange rate with USDf increases as yields accumulate; FF is a governance token, staking it grants sFF and participation in platform revenue sharing. In simple terms, it's a two-layer yield structure—one from upgrading USDf to sUSDf, and another from upgrading FF to sFF.

The most practical design involves layered access control. To deposit, mint, or redeem USDf via the official interface, KYC is required. However, if you already hold USDf on-chain and want to stake it directly to earn sUSDf yields, the documentation explicitly states that KYC is not mandatory. This creates a gray area—users in certain regions (including the US) may be restricted from direct minting on the platform but can still participate in staking and yield flows on-chain. In other words, "USDf on-chain circulation" is close to permissionless, while "minting and redemption" are set as operations with access thresholds.

This differentiated approach allows the project to avoid the complexities of global regulation while providing a pathway for ordinary users to participate. From a risk transparency perspective, it is much more honest than many closed-box projects.