is it possible that we can use bitcoins in buying all commodities not only in one country but the entire wold? and how will this affect the economy.
it is the opposite, isn't it? people in the same country would do the payment with their own currency as it used to be to make it easier. on the other hand,
BTC is quite good to do the transaction abroad easily. In my opinion, if someday let's say 30 years ahead people in the whole world use bitcoin as the main payment , which government couldn't control it and doesn't get any tax from it, that could affect the income of the country ehich is decreasing.