To date, there are 4 countries where they love and recognize cryptocurrency. These are Japan, Switzerland, Malta and Cyprus.
Of these countries - the most progressive country in terms of regulation - is Japan, because this is the first country to recognize the cryptocurrency as an official means of payment. Japan is also a leading cryptocurrency market with 60% of global bitcoin turnover. In Japan, high culture of using digital currencies, a developed network of cryptomatic, and the payment by bitcoin is almost a common thing.
That's why-Japan, in my opinion, is the best country for the legal registration of ICO.
Japan is ahead of the rest of the world, however, like the rest of the countries, what you called.
I would add Belarus to this list as well, this is my home country, and we will have legislation at the end of March that will allow legalizing crypto-currencies and sell them without paying taxes, including dollars and similar currencies.
Japan is very open to be able to apply the digital currency in the country's financial system, this is a very rare thing because not all countries can make that decision. Japan started the era of digitizing currency a few years ago, Japan is very supportive of Bitcoin circulation and also the making of a project. Now has not found other countries that can do things done by japan.
So I think also that the country that supports the digital currency in full is japan. To increase the use of digital currency it is necessary to educate the advantages and benefits of the use of digital currency.
https://www.forbes.com/sites/outofasia/2017/11/02/japan-a-forward-thinking-bitcoin-nation/Look at it a few months ago. Forbes even mentioned Japan as the foremost use of Bitcoin, when Japan is friendly to Bitcoin so they will also be friendly towards the use of all digital currencies, including with the existence of a legal ICO.
Japan has always been one of the first countries in the world to develop and introduce new technologies, it was with the standards of telephony, computer and robotics. Now we see this in the example of bitcoin and other crypto currencies. And after all, Satoshi Nakamoto is probably a Japanese name)
At the same time, we already see a lot of countries that have realized the prospects of crypto currencies and have started following the example of Japan, I think if the same goes on, then soon we will see serious competition in this market.