Let's just reduce this post to "Bitcoin is backed by nothing" type of argument and its value is determined by the people who uses it. This has been raised plenty of times before and yet bitcoin is still alive. Never destroyed.
Exactly, not only that, there has been a lot of rumors, scam accusations and etc that was thrown to bitcoin by various people or personalities but bitcoin is still alive. Bitcoin is a very strong technology that can't be tamed easily with anything, bitcoin has its share of advantages and disadvantages because nothing is perfect but bitcoin had helped a lot of people thus it will not be destroyed easily.