This is the truth that this friend is saying. Currently, it is only a "mapping" and does not enjoy any benefits. That's why I say it is like an unstable stablecoin. For example, Circle and Tether used users' money to buy US bonds, and users received the mapping (stablecoin) on the bond chain. However, the returns of the bond are completely unrelated to the users holding the stablecoin, and users holding the stablecoin cannot deliver the bond.