in my opinion bitcoin isn't scary, for me it's a new technology. But many people who abuse use Bitcoin and are used for crime (I have seen several news sources about this). and talking about the future, maybe bitcoin can be accepted sincerely by all countries and get a more suitable position legitimately so that everyone can use it freely and conversations about bitcoin will be considered as normal.
If you are part of the government or part of the most powerful persons around the world then it is possible that you are afraid of something like bitcoin and it makes sense, they control the world and out of nowhere a technology appeared that will diminish their power.