* All stock market stuff feels modern, because 15-year-olds don't talk about it but 25-year-olds do. So it feels like something that wasn't really around/popular when you were young.
* Some would say retailer investors who want to buy individual stocks should be holding them for the long term - and that a mobile app, letting you trade on the go, is an anti-feature.
* The rise of Reddit's Wall Street Bets, who glorify moves that seem really dumb.
* The rise of Cryptocurrencies, and/or their marketing to unsophisticated investors. If I put my entire life's savings into Dogecoin, does that mark me as someone so dumb you should save me from myself?
Yes, stock picking and penny stock scams have been around forever, but it has never been so easy.