It's obvious why it exists. Dollar liquidity inside of the crypto network ecosystem. You can quickly move out of volatile assets into stable coins. You can tran

It's obvious why it exists. Dollar liquidity inside of the crypto network ecosystem. You can quickly move out of volatile assets into stable coins. You can transfer these stable coins quickly into and out of wallets and contracts. You cannot do either of these as efficiently with pure fiat which would then require an "IOU" from an exchange which would be less transferable, require trust of the exchange, and would insert friction moving into or out of the $.