It seems impossible for bitcoin to fall to one dollar as there are more and more people using and gaining knowledge about the system. The only possible way for it to happen is if something tragic in the economy happens. Essentially, it is pretty impossible right now and in the next 10 years. Hence, my speculations can be as good or as bad as the next person as it is something that is hard to predict as it is highly unlikely right now.
I think he already knows that fact but the question here is only a kind of what if. If let say it is possible, I don't think Bitcoin will recover anymore. There might be a brutal reason on why its value fell that low, that even a major demand won't make much difference anymore. Bitcoin is different from the fiat currencies.
It's not totally depending on the status of the economy. The next 10 years are pretty long and we don't know what can happen during those time span. I don't want to be negative this time so let's just pray and hope that Bitcoin will only grow bigger and stronger. It was still normal for us to experience a negative news but mostly those are manageable.