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.
I think we don't need tor rush right now. The reason they are implementing many solutions for the issues of bitcoin is that they are looking forward to these developments. I think it will be possible after years of finding solutions to the problem of transacting and using bitcoin. In terms of economy, I think bitcoin is helping the economy of one's country because bitcoin are creating new millionaires to people.
I agree with you, the bitcoin now is not so powerful to compete in other demand currency. It is possible to become a world currency, need time and more develpoment of bitcoin is needed, because it is not so popular now. Need first of many user and legalise around the world. With the huge value of price it has ability to compete and use by the people, I'm sure if some people discover the benefits of bitcoin it will also accepted by other people and also the stores.