I think the allowance and regulations of bitcoin alone could create a lot of tax income for any country, if you are from a country that is in need of fresh money to increase the GDP and give your public a chance to actually survive then creating a cryptocurrency economy will help you a lot by paying you taxes on the crypto income which will in return used for the betterment of that public.

Even companies overseas that are not living under relax regulations for bitcoin or any other crypto will COME to your country just because you have better tax regulations. That will be the savior of any countries economy if only they could take advantage of that but I doubt anywhere big will do that now and all small ones are looked too unstable to test something like that for now.