By the way, why do we keep having this sort of question about Bitcoin only when the market condition is in the bear trajectory? Is it that we have never seen this market dips before? It has to take more than mare bear market sentiment to think Bitcoins price will fall to zero plus, I agree with what goldkingcoiner stated here:
Truthfully, I very much doubt Bitcoin will ever be worth absolutely zero. Even the dollar note could never be worth less than the paper it is printed on. There must always be a bottom value. And unless we see an abrupt and sudden deadly, unfixable flaw with Blockchain, the technology behind Bitcoin, then there is nothing to worry about. And anyway, its best not to dwell on impossible scenarios. They only fuel your personal FUD.
If there is no disastrous problem with the network how can Bitcoin cost less than what it takes to mine it?