Credit cards are unreliable, I always carry cash
Can't count how many times I have been someplace buying something and the stupid credit card machine failed (just happened last week taking my kid for ice cream)
Its happened to me on vacation multiple times, make a charge and fucking card gets cut off by fraud protection (this has gotten better with technology, but still not perfect)
I had two credit cards shut off one after the other on a vacation trying to buy groceries in a fucking grocery store, and one of the credit cards had a note that I was traveling to the area on file.
Cash is king, anyone that thinks otherwise has been duped
If anyone refused my cash, I would take their refusal as my goods and services were free