Because an ecash token can be independently transferred between bearers outside the system of custody.

with recent FC + LNDBugsEra5+years small plebs are looking into best alternatives - cashu n Liquid-BTC There is trade-off between self-custody vs fast payment in secs LN maybe best for zaps or point-of-sale payments while storing offline for longer duration moderate amoutn LQ or cashu ecash etc is best for now 🤙🏼💜 🐝

Category error: ecash is not a "form of custody", its full trust. Even if you self-custody, you can get rugged.

the supply of ecash is not limited to 21M therefore you custody shitcoins