if all the governments of all the world joint hands together to banned bitcoins ,then only would bitcoin can come to an end.otherwise it is not gonna happen no where soon. because of its decentralization and no technology could beat because it is the first of its kind
That wouldn't be an end but it will certainly hit hard
The prices would likely go down dramatically if they would mean anything at all since most if not all exchanges will be closed down or denied access to (by the Greater World Firewall). Internet seems to be the weakest link where governments will likely hit first. Indeed, there is DarkWeb and things like Tor, but how many users would be using them? In other words, we would quick get back to the 10k bitcoins for a pizza times. Obviously, this is a doom and gloom scenario, and the longer Bitcoin exists the lesser are the chances for it to come true, but we still shouldn't write it off completely
That seems to be demonstrably not true in many/most instances. Normally criminalization of a desired thing increases it's value, and the more effective the enforcement, the higher the value goes.
You may argue that BTC would no longer be 'a desired thing' if Big Brother hassled users of it. I don't believe this is true at all, though it absolutely would change the makeup of the userbase significantly. Mostly it would shift it to the high-end criminal enterprise space, but this class is by no means small or weak. Such shift would be a direct consequence of government policy and no fault of Bitcoin.
I had guessed that the idiot Chuck Schumer classes would get their way and try to criminalize Bitcoin prematurely. As it happened slightly more shrewd strategists seem to have gotten the upper hand back in the day. Their strategy was a much better one; attack Bitcoin internally, and the most likely avenue for this would be by damaging it's fungibility. This would entail legislative means but probably can only be done with black/white listing. For this x-listing, Bitcoin operation needs to be centralized to a smaller number of entities who can be pressured by the realities of needing corporate providers (space, power, bandwidth, etc.) That I see as the primary driving force behind the various efforts to bloat Bitcoin.