Utilizing the coins as payment for park or museum is interesting, but doesn't it get to limited expandable area?
I think people that wanting to have this kind of project will be limited?
Coins are supposed to be used not only for payment for visiting parks or museums. The scope of the coins will be much wider.
ART-PARK service use will allow to buy tickets for visiting cultural sites (museums, theaters, cinemas, art galleries, etc.),
for any event in any city and part of the world.