Haha this Mr Duncan, supposedly a guy invested in BTC and ETH for a while, can't even spell the things he's holding. Not sure if that's the best endorsement to showcase..
I'm sure he did. Why? Because he "can" and it's fun for everyone, even millionnaires to hold a few cryptos for the fun and mostly the technology aspect of it. When you "invest" in something, you somewhat become more curious about it, in general...