eCash is useful for many things. First of all, the token is the money. Which means you can send money offline, for example, just by sharing a string or QR code (or tapping phones via NFC / Bluetooth / whatever). FediMint has this feature, and it's very useful in certain situations. It's also very private.

You can also use eCash tokens as authentication strings, e.g. to retrieve data from an API or DVM. You can think of it as accessing something and instead of putting a regular password you put an eCash string into the "password" field, so you immediately and directly pay for the request. No account needed. #SovEng people are exploring this as we speak.

My 2 sats.

cashuAeyJ0b2tlbiI6W3sibWludCI6Imh0dHBzOi8vbGVnZW5kLmxuYml0cy5jb20vY2FzaHUvYXBpL3YxL0RqSE1xQk1RR1N3S2Mzb2lSeDMyNHciLCJwcm9vZnMiOlt7ImlkIjoiaGw3NTV5MVY3UU1jIiwiYW1vdW50IjoyLCJzZWNyZXQiOiJaYSs0TVBHUHR6OFlCbzBIeE1HOGYzOTRlVVhkbkQ5NTYydkxTSStTYVJvPSIsIkMiOiIwM2Y4YjQ2ZDAzODM3YjY1NTM2ZTJmYzYwYzg2NGU0NjBmZDJkOWQ5ODExNzc4MTNiNzIxZjhmZmNjMWVlN2U0ZTMifV19XSwibWVtbyI6IlNlbnQgdmlhIGVOdXRzLiJ9