I mean, does one want to "make money", or simply enjoy the thrill of an (expensive) roller-coaster ride? I commend him for having the balls to "YOLO into DogeCoin", at seemingly the right time, but when he was up over 3mil $USD worth, Graham Stephen and Andre Jikh and I think one other YouTuber Millionare, were trying to convince him, pretty strongly, if not to sell everything, at least sell "A portion", and buy a nice home out in Vegas, near them. At least put some of it into Real Estate, and not keep everything in Crypto. But no, DogeCoin Millionare would have none of that "selling" talk. "Diamond Hands, baby!". None of my business, really, and hindsight is better than 20/20. But I know I'm not the "HODL" type, and I'm quite willing to "take profits".
Have you actually looked into it? That's incorrect. DogeCoin is merge-mined on LiteCoin ASICs. You can't mine it on GPUs (effectively).
"Mineing" DogeCoin on Unminable.com, actually mines ETH on your GPU, and exchanges it for the coin of your choice.