vinney on Nostr: Cashu "tokens" (long strings of letters and numbers, like an nsec) are bearer assets, ...

Cashu "tokens" (long strings of letters and numbers, like an nsec) are bearer assets, exchangeable via a mint for a backing currency like Bitcoin.
So you can share a token with your friend in any manner at all (text, email, etc) but the easiest way is by using something like boardwalk.cash which will hold their hand through a claiming process