Jesus, dude. Have a Coke and a smile.

I didn't want to go down the conspiracy theory highway, just the reality of electronic commerce superseding analog, given the trend.
The number of checks I write each month is down to 2-3 from 15-20. I don't carry cash in my daily life. Everything is credit/debit card. I think the change from physical to virtual will occur more by natural attrition than government edict. There are those that would argue, and rightfully so, that having the entire world monetary supply exist only virtually, as 1s and 0s in the ether, is inherently dangerous. Granted, much of it (think stock markets) exist only virtually any way. Stock share certificates are a thing of the past.
Regardless of how it happens, when it happens, or to what extent, my original point stands, that as time goes on, businesses/dealers that don't accept some form of electronic payment will feel an increasing impact on their business.