I think bitcoin can change the economy. Bitcoin is the highest value electronic money. The bitcoin market is expanding around the world. Many companies, large corporations invest in bitcoin. Banks are considering accepting bitcoin. So bitcoin can change the economy.
But it is great reqgret that all countries are not accepting bitcoin as legal currency. There are many countries where bitcoin is illegal currency. As bitcoin is the future money and it has a lot of sector so it is sure that bitcoin can change the economy.
even if we imagine that Bitcoin will be legalized, what will happen to the economy of the country if bitcoin has such huge fluctuations in price? I think it's still too early to talk about this, because Bitcoin's trust is very small and there is very little opportunity to use Bitcoin as a payment tool either.