Earlier quoted context omitted.
Analyse your spending habits to see where you can easily save some money is one example.
My BofA account has a whole spending habits section with graphics and charts and a ton of features, for free, which comes with my debit account. Why would I want to do all this myself? The only real answer is privacy, but I would just use BTC instead of USD if I wanted privacy anyway, and BTC is already programmable.
ymmv, of course