technically speaking, can bitcoin really be banned?
You were born yesterday, am I right?
Bitcoin was banned on some countries years ago such as Bangladesh, Bolivia, etc. See for yourself here https://www.cryptocoinsnews.com/top-10-countries-bitcoin-banned/#. That was last May 2015, some countries listed there accepts bitcoin now or on the process of acceting bitcoin. So banning bitcoin in a particular country is very possible. They have their own reason of doing so.