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I guess one of the main point of the cryptocurrency is being non-physical money. Because world is getting away from materials (Architects used to draw on papers now they do on softwares, or developments on virtual reality..)

I can't see physical coins will be a huge thing. I think people just dont want to carry physical money anymore

Yes they are mostly just a collectors items doubt you would see these being heavily used although i have seen large exchanges take place using physical crypto.

Correct. I pay for everything with my watch. If their machine won't take it I cancel the order and go elsewhere. People don't want physical cash. I have none. - Ever.

Well that is a good approach which I had it too in my life, but then one day I went to a food truck and I was so hungry. They told me they only accept cash :(

And I was like nooooo

Then I learned that I should carry at least 20 dollar with me all the time.