Choose whether a collection's secondary sales are priced in the chain's USD stablecoin or in its native currency. On Robinhood Chain collections default to USDG; send use_stablecoin false to price in ETH. The owner or an authorized editor can change it. Repricing runs as a background job, so listings move to the new currency shortly after the call returns. Multi-chain collections and collections with trading disabled cannot be switched. While a switch is still running, another request returns 409; retry once it finishes.