Not really.
A lot of countries are openly supportive to it. If they all come together and try to ban it, or individually try to do so, it will always lead to debates. They don't want to risk that and shoot themselves in the foot.
The reality is that the banking industry has become a part of the tech industry and as tech evolves, new forms of currencies are bound to evolve. It is bound to become obsolete, so Bitcoin wins.
While I do think you are most likely correct, I don't think it means that it isn't a possibility. It may not be a strong possibility, but it still is one. To be honest, if the US and Donald Trump made it illegal to own or transact in bitcoin tomorrow, it would do a ton of damage, not kill it of course, but it would crash the price to levels not seen in years... and all it would take is a couple other big countries doing the same and bitcoin would be relegated to the underground as a niche currency probably never again reaching the valuations it's currently trading at today.
See. Not being a fan lead to discussions. What will a ban do?
There are a lot of people who have put in their money in cryptocurrencies though they don't understand it. They will also ask questions if they lose their money. In doing so, will have to understand more about everything and that includes the banking system.
It would do a ton of damage to Bitcoin? IDK, but it would most certainly do a ton of damage to the banking industry. Meet any american and ask about his life. He or She will tell you how many credit card payments he or she has to make. Why do they have so much debt?
People in America anyway hate the banking system, especially, since 2008 crashdown. If everybody starts asking questions, that will be a nightmare & that's what's going to happen if they try to ban it completely.
If they could do it, they would've done it. Why haven't they done it?
It hasn't been a real threat to the supremacy of the USD, at least not yet. If it gets to the point that it is, they will try to ban it. Bitcoin needs to keep itself in the digital gold category. As soon as it starts threatening the dollar, it will face a ton of backlash.