from the illustration of the image according to my understanding is a natural disaster.
will bitcoin bring disaster to the world ??
No, that is not. Bitcoin are giving to us a big opportunity and can be changed our lives and of course it will not bring disaster. If all people are believe that Bitcoin will be the world currency, the OP says is the possible will may happen to our world.
Base in broad understanding, bitcoin can be possible to be the best remedy that can can be the solution to avoid poor life of living. It's depends on us if how we can use it. But the best things to do is using in in appropriate way therefore we can also gain much better from this that can change our life for the better. There's nothing wrong to believe as long as that it can possible make ourlives and our economy much better in the future.