if i refer to a bubble, it is not bitcoin per se. as you said, bitcoin is backed up by real computer power, real hardware and so on... but that is not the point. as the whole fiat financial system is a pyramide sheme (=cash scam, ponzy), it is inherently unstable and destined to collapse sooner or later (the question is not if it collapses, but when). i was reffering to the price development in the last couple of weeks, where bitcoin rose from 7k-ish dollars in price to about 2.5x its value in a pretty short time. if you understand anything about economic cycles and product lifespans, you can clearly see the bubble in the price chart (bitcoin is a prime example for market development, market phases and lifespans). the bubble i was reffering to is the bitcoin price in the last couple of weeks, not bitcoin in general. maybe there was a misunderstansing regarding that point and i hope i could make it a little clearer :)