- Onramp: The way to acquire blockchain tokens using your fiat money (or other non blockchain assets).
- Offramp: The way to buy something meaningful using your blockchain tokens. This almost exclusively involves using a centralized exchange, which would force the identity of the account-id to be revealed.
One of the goals of the original Bitcoin and Web3 movement has always been to have local merchants to accept Bitcoin as a means to buy food and day to day means, such that the offramp is no longer needed. This is not yet the case, except for a few rare exceptions.