And it will remain so for a long time.
No government, no parties can effectively ban it and put their hand on it. They would have to ban internet first. Not likely.
That would be the end of free world we know.
Yes, bitcoin transaction cannot be cracked and destroyed yet it can be stopped by government's putting regulations or serious damage to it that amy hinder its use and may lead to people's lose of interest to it. If no one uses bitcoin ever again, its strength and invincibility will be useless.
The blockchain itself is the good technology that will give strength to bitcoin. The only thing bitcoin will be non-sense is due to the government's decision to ban or internet shutdown. So as a bitcoin user, don't support the currency, support the technology itself.