We’ve had this write-up in some various mental states floating around for a while, and better done than perfect. So treat this as a core idea to be fleshed out later.
Payments and banking companies should be looking at how people purchase and store digital goods and digital currency in video games. That experience has been polished over 40 years, and is what will be the default expectation for future generations.
For those interested, here is a website that collects user experiences of shopping across hundreds of designs.