This would actually be a really good idea
For a bitcoin enthusiast - yes.
I think because Bitcoin is easy to use
Plase, show me a FAQ, that would be enough good to entroduce fast to bitcoin some people of age 55.
and for many it would be a nice and quick alternative to fumbling with cash.
Credit card and other electronic payment methods are with no cash
Also because Bitcoin is electronic it also ties in with the saving energy ethos
How much CO2 is produced from running minning computers every day?
The electricity is produced by burning gas, carbon, garbage, oil, and only nuclear stations give no CO2.
I see no point with "saving energy" here.
instead of using paper money which takes away a lot of trees.
Why do You worried about trees?
The oxygen is produced by plancton in Oceanes. Trees produce no oxygen.