but the app could split the balance across different mints, so decentralizing the point of failure of a user. Also user can use different mints. Cashu is not a central mint protcol like the ones before bitcoin, is a network of mints based on foss protocol AND lnp/bp. These mints can do nearly instant settlement on lightning network, so become difficult to perpetuate scams for long time.
And is open to innovation, we will see new solution to minimize risks and maximize advantages.
I see great potential for the use cases not well served by non-custodial solutions, like micropayments when bitcoin blockspace is highly requested.