It will be great for us, we can easily buy everything and we can used btc in any countries, but it won't be too good for the country, the government need to arrange well so there is no tax evasion, and it also need to be controlled so crypto usage cant caused another inflation to the country, the best way to settle this one is to set up regulations
Probably if so, it will bring us a big benefit with using bitcoin for payment. We can use for paying goods, services or that sort of thing. Generally, when bitcoin is accepted in most parts of the world, it will help people solve many fanancial problems. However, when bitcoin is supported worldwidely for payment that we will have to pay tax like fiat currency. Its much more possible, because we all know that most of governments try to prevent people from using bitcoin, they will never let bitcoin be used easily or without tax.