There was another post on HN just 2-3 days ago, about how an HN-poster was taking a cab in Sydney and the cabbie was talking to him about BTC.

Cue the inevitable Joe Kennedy comparison: Kennedy Sr. supposedly got a shoe-shine one day, and had a conversation with the shoe-shine boy about said boy's hot stock tips. Kennedy realized everything was overheated and overhyped, and pulled his cash out of the market; the crash of '29 happened not long after.