worst case scenario for cryptocurrency

[lalabotax]

Every collaboration between governments will always involve any significance for their countries. And this may not be as interesting as Bitcoin and Ethereum. Moreover as others says, the coins will be centralized because the government will not let their creation be decentralized without any rule and regulation under. And this may be very complicated if some government doing this.
I believe that Bitcoin and other cryptocurrencies will still survive, moreover many people are still more interested in something decentralized, something very promising like BItcoin. We will not let something happen very bad to the crypto 

[lenovop-70]

All government in the world will never make same blockchain as same like BTC and ETH do, if it happen, it is will make world only have one currency, and that is impossible. Just imagine 1 euro will be same as 1 rupee, thats will cause euro collapsed because they will decreased their value, and make rupee overvaluated and make it worthless.

[GeorgeJohn]

Firstly, I really don't think governments can come together to agree on one currency. And technology is fast evolving we almost cannot determine how it'll go or what it's future is like.
But I think we can be prepared for whatever is to come.

Government can do it, because since existence of bitcoin government is looking for one or two ways to eradicate bitcoin or bring bitcoin down more especially not to be influential, so with that scenario it's obvious that bitcoin is problem of government because if it's not so, government would have free bitcoin, because right now some countries never legalize adoption of cryptocurrency to their society.

[Slow death]

the question is, if the world's governments collaborate to create a blockchain network that is the same as Bitcoin and functions like Ethereum, then will cryptocurrency can still survive?

and since when do all governments collaborate with each other? we need to see how the world is divided, the countries have some little collaboration when it comes to money and concern politics, they wouldn't spend money and collaborate on some blockchain project, imagine russia, china collaborating with the US on some project of blockchain, do you think that would ever happen? I think not.

Another thing I think governments won't do anything drastic for bitcoin and altcoin, just think:

Have you ever seen rich people investing in things that they know would be a waste of time and money in the future because governments won't accept it? Of course there are some small cases where the rich lose money due to bad choice, but concretely speaking of bitcoin case if the rich are investing in bicoin Is because they know that governments have accepted bitcoin, the rich have influence and constantly talk to the politicians and governments