1. countries don't build side walks. People do
  2. countries don't have "own money", banks do and are called currencies. Don't confuse currency with money.
  3. Nobody is forcing you to use banksters money, only the belief in a state makes you think that. Statism is the most dangerous superstition.
  4. You are free to use whatever meaning of exchange, if you are capable to convince the other party of the trade to accept your "thing" as money.
  5. Bitcoin is not fixing the world, people fix it by using Bitcoin.