what makes ecash better than a regular custodian or even better, something like galoy? fwiu they don't know the balances of each user, so privacy is great. regarding rugpullability,,, can they steal from the user(s)? can user verify the mint has the funds?
galoy has proof of reserve issuance which is a bit of a guarentee, does ecash have something like this? 

 Ruggability is the same, but censorship resistance and privacy is a big plus. There's also proof of liabilities for ecash.