100% scam call using ledger-live data breach information to claim that my crypto exchange account was compromised. (He slipped the ledger bit that when I shared I didn't have an account at the specific exchange, pivoting to talk about ledger live accounts being partnered with that exchange or some bs).

Sophisticated in the sense the guy had a reasonably well spoken UK accent.
Tried to give comfort by successfully sending me SMS a code then confirming the number it had - the text displayed as coming from the name of the exchange. (don't trust it!)

Waste their time or just hang-up.