Bitcoin is not meant to break the economy of any country but rather to help raise the economic status of a country as it gives the people financial freedom and independence. This financial freedom and independence is made possible through the decentralized nature of Bitcoin which grants the users the total control over their own transactions without any third party interruptions.
If all of us use bitcoin as a mode of payment and the government didn't regulated it. It will break the economy of the country.
Yeah it's true that it gives financial freedom and independence but how government will gain from it.