We need to get below ten dollars to shake out all the weak hands. Only then can a true, sustainable growth phase begin.
If it will go below 10$ than will mean that bitcoin failed and will be replaced by something else.
I'm not sure I follow. The success or failure of the protocol isn't really tied to the price. Sure, if we go back to single digits, it
might be an indication that mainstream adoption is unlikely. But if mainstream adoption isn't achieved, that means bitcoin failed?
Yes.
* we fall below $10, it will be an irrefutable indicator that people have abandoned Bitcoin in such a drastic way that the experiment may be regarded as failed. It will have been a great experiment, but Bitcoin will have proven itself faulty for most cases.