Like I said before, that is simple: (collectively) don't sell for less.
That IS the back up.

The question is more if the Bitcoin Community is willing to take care for the stabilization of the price (a smooth redistribution of wealth) or like 'financially focused' individuals who scares the mainstream community with the most creepy cycles possible (and make profit out of them).
The mainstream community are the people who are able to make bitcoin the success we would like to see.
...well I hope...