If you're looking at the proce as the only indicator, then see, we are at $5200 with hardly 2% of the world population. Think what will happen when the adoption goes up to 10%. Think about the amount of demand we will have. That increase to $19k was inorganic and everyone knew it wont stand. Look long term, leaving the spikes of 2017, we are pretty much going up. Btc definitely have future even if you're considering only price point of view.
That is the point that many of the cryptocurrencies enthusiasts are finding very difficult to comprehend. Just 2% without governments approvals or adoptions and we are at were we are today then think about five to ten years when we are going to have many people adopting and use it!