I dont think it is a bubble.
Bitcoin atm is simply responding to the demand / supply stimulus.
price is going up, people perceive as a good investment, buying bitcoin and the price keeps going up.
I agree, it is has spread too far and wide now. Soon all the major companies will be adopting it macca's, amazon, apple and the demand will grow from there. Most people who believe it is a bubble do not understand what it is all about......but they will. In time they will.