how many country of the world now accept btc? 
It can't be determined about how the total numbers of countries are accepting bitcoin right now. But there is a conclusion if a lot of countries are accepting it without an official announcement from the government. I said that Those countries were not determined the Bitcoin as an illegal or legal commodity. The bitcoin still on the gray area. I mean all of the risks on bitcoin was becoming the user's responsibility.
I remember in the eraly month of 2017 I think february when the central bank in our country talks about cryptocurrencies and how they are going to regulate it. What you're saying is true, as long as there as no further announcement made by the government there is also no laws regarding on this matter and that's make you in a pinch situation when something bad happens because there are a lot of things missing in the system of Bitcoin. The right way in measuring things like credit risks and formal resolution in transacting btc are still missing here.
For the meantime, I'm reaching the updates regarding on how my country will adopt to these changes. Right now I am responsible on all of my coins.