Well apparently JOMO is already a word way back in years (as was stompix already have mentioned), it is just that it became more common and common nowadays. Why? People these days tend to eager to learn more about trading to be their side hustle or just something to get a little income from. While the market grows bigger and bigger, trading became somewhat mainstream and FOMO was the most used (of course, most people tends to feel fear not trying things they will soon regret). And when many already felt hey lose more being FOMO-ed, they now prefer being safe than sorry, a better choice tbh.

Now how I have ever felt the Joy being missed out? We all do, especially when we where to talk about Shitcoins last year that became popular for months and now NFTs that slowly are being populated with scammers and rugpullers. Maybe being experienced in crypto space unlocks such 'joy' that you just preferred not to give a f*ck than spending time and money for nothing.