This gets me thinking about creation of "easy" financial products that emulate the familiar, targeted toward people who can't be bothered to learn about bitcoin. 

Yes. I know. There are examples now in companies like Fold and self-custody or multi-sig IRA... these are primarily opt-in vehicles for those who have studied a bit. 

I'm just wondering out loud whether there's something to be done *within financial institutions* to "supercharge" legacy financial products by adding a dash of bitcoin to the mix. 

What about paying interest on accounts in bitcoin? A typical retail/consumer savings account might earn 2% or less and a typical interest-checking account might earn 0.25%. Perhaps if the offer was "interest paid in bitcoin to your institutional account (custody)" or, for those who bother to learn self-custody, "interest paid in bitcoin to your KYC'd self-custody wallet of choice?"

Incentives seem to align here. 
Thoughts?