A while back, when I was in Japan, I visited some Pachinko parlors. Basically, they are ”legal” gambling houses, where there are ”slot machines”, and you put real money in, and you win ball bearings. Yup, ball bearings.
So after a few hours, and if you win, you end up with a few trays of ball bearings. Then you go cash out. Well, you don't exactly cash out, you take the ball bearings to a ”cashier”, who will exchange your ball bearings to colorful boxes. These boxes varied in colors and sizes, depend on how many trays of ball bearings you were carrying.
Then, you leave the Pachinko facility. Immediately outside, someone will direct you to a small office near the establishment. There, you can sell the colorful boxes back to someone that will buy them for real money.
I'm not surprised that ball bearings and colorful boxes have gone digital, I should have thought of that.
I should also have invested in ball bearings, and colorful boxes.