A fad, by definition, is a short-lived craze. Bitcoin has been around since 2009, which means it's coming close to the 10-year mark and that, in my opinion, hardly constitutes a fad. If anything, it's only now beginning to mature as people begin to recognize and appreciate not so much the speculative value of the coin but rather the underlying blockchain technology that has begun to revolutionize the digital age. If Bitcoin were indeed a fad, why are the major world powers now giving so much attention to it and trying so hard to reel it in? Australia, China, United States, just look at Russia, which is by far taking the most progressive and aggressive stance on Bitcoin and the crypto market in general (under the guise of consumer protection)...they're now looking to establish a 'crypto detective agency'!

https://news.bitcoin.com/russian-regulators-crypto-detective-agency/?utm_source=OneSignal%20Push&utm_medium=notification&utm_campaign=Push%20Notifications

These are hardly the signs of a fad that's about to fade away into obscurity.