Earlier quoted context omitted.
There's been fads bigger than Bitcoin that no one remembers anymore. The true test of Bitcoin is longevity.
No, there has never been a "fad" that had a 100 billion dollar market cap.
If even 5% of bitcoin held were placed on the market simultaneously the whole thing would implode like a coke can filled with a vacuum. It’s totally illiquid and any attempt to cash out by a significant proportion of holders would herald instant disaster. That’s why it’s so volatile. Research shows the 2017 peak and crash were due transactions by a single ‘whale’.