On August 8, crypto smart contract auditor Pashov Krum proposed that PayPal's dollar stablecoin PYUSD has the risk of "centralized attack vectors", including operations used to freeze or suspend on-chain functions of specific addresses, such as freezing the transfer function of a certain address and providing more control over the behavior of smart contracts. In this regard, Ripple Chief Technology Officer David Schwartz pointed out that the value of this centralized stablecoin is actually that PayPal has a legal obligation to convert PYUSD into US dollars, which helps prevent innocent people from receiving tokens that PayPal has no legal obligation to convert, thereby reducing risks. Schwartz believes that PYUSD currently has three other risks: 1. The risk that PayPal does not fulfill its legal obligations. 2. Users mistakenly believe that they have tokens that represent PayPal's legal obligations, but this is not the case. 3. Users and PayPal disagree on whether the token represents PayPal's legal obligations. This function mitigates the above three risks. David Schwartz also pointed out that PYUSD is not a real cryptocurrency, but traditional finance, just like money in a bank, which is "the legal obligations of others."