yes, any real economy will develop trustworthy actors that will serve the role of banks and the like to serve the very people that you mention.
in the future i will presume (and hope) to see a phone app that is like a pre-paid bartab for shops you regularly visit. basically you top up your starbucks app account(wallet) monday morning which locks in funds to be classed as preconfirmed. that way you can walk into starbucks press send and the funds move to starbucks own corporate main wallet, meaning they don't have to wait for confirms as it is all preconfirmed and the funds are technically looked after by a standalone(opensource) app, meaning trust in a middleman is not required.
and to add to security. have a private key generator that uses the shops name. a password the customer uses and their phones IMEI number. that way its lengthy, unique and even if phone is stolen or someone gets the imei number they still need the password.
so if you have the app 'manager' taylored to starbucks even on the same phone, ssame password it will produce a new private key compared to walmart.
that way the app manager can manage many private keys and able to restore them if the customer provides the password and IMEI of their phone, should their phone go missing.