Bitcoin is actually exhibiting signs of a bubble. It has its inflated and deflated state, and right now we are at its deflated state since it keeps on losing its value from its ATH. It will inflate once more if the price continues to be pumped, and afterwards expect it to 'pop' since correction will take place, and obviously it will lose its value just like a normal bubble would. This does not come only from those who lost their investments but also from keen observers who know what a bubble is.