What is Ondo Finance? Is Ondo legitimate?

Ondo Finance is a leading issuer of tokenized treasuries and money-market funds. Its main products are OUSG (short-dated US Treasuries / money-market, about US$3.56bn) and USDY (for non-US investors, about US$2.37bn). It falls in the category of "real underlying assets with a named custodian": OUSG involves StoneX and BNY Mellon in its custody arrangements and is deployed across several chains. Whether it suits you depends on the specific product and investor eligibility — the tokens are asset-backed, but subscriptions are usually limited to eligible investors, secondary liquidity is limited, and the token is not a claim on the US government or any institution.