The Chinese has tried to "shutdown" the internet in their country for years and the people there still bypass some of those restrictions.
Let's say there is some truth in what you are saying... your Bitcoin would still be safe. {It's recorded on the Blockchain}
Not ALL governments will shutdown the internet.... There has not been a single event in the history of mankind, where all nations agreed on something.
The Blockchain can function on many other communications methods and it will soon be into space.
