Demand for bitcoin is provided not only by its popularity, but also by its promising technology, which our world now very needs. People simply will never invest their money in something they do not understand.
Bitcoin has achieved tremendous popularity so demand is so large that prices become very expensive, according to commercial law where demand is greater than the availability of goods, prices will rise.
The question is whether this very expensive bitcoin price is due to need or because of popularity? If the needs of the price can stabilize or rise again, but if the popularity can fall when its popularity disappears. For speculators who have bitcoin from the start clearly have enjoyed many advantages.