http://kathmandupost.ekantipur.com/news/2017-10-06/7-nabbed-for-running-bitcoin-exchange-business.html
First case of bitcoin related arrest in the country.
The story is totally different from what your title states. They are not arrested for trading bitcoin, but they are arrested for illegally running a bitcoin exchange in the country which would not be allowed in any country, and anyone would get arrested if authorities come to know that some people are running an exchange without any license and legality. It should not be a surprise for them, nor for the people hearing the news. And they should have been expecting this to happen, because running a bitcoin exchange is quite a big business these days, and if you try to do it hiding behind walls, this is what you can expect when it comes to the sight.
I guess that is exactly what will happen across the world that government will say ' do your business, but do it the right way or else we are coming for you' and I think this is something that should be encouraged in as much as we want to run our exchange business and make money, we owe a duty of care for individuals patronising the platform to be safe. Aside that, anyone who does not have the intention to scam would not have any issue registering with government.