I have an interest in penny stocks these days. I follow people who post on those, taking most of what is written with a grain of salt. For that reason, I use Twitter more than Stocktwits, which does not support penny stocks.
I have an appetite for risk. I'm a university prof, so if I lose value I can pretty much work into my 70s and 80s, and even if wildly successful I may just do that anyway. My research gives me a sense of purpose, while also offering start-up possibilities, and I think this academic activity will greatly delay the aging process (that, plus staying fit with yoga and racquet sports). Many of my colleagues down the hall are in their late 70s and are still vibrant.
I'd rather do that than retire, stay home and have my wife tell me what to do.