Sadly these folks have no idea what doge is and are just buying it because he mentioned it. They start crying when it doesn't go up for a few days or comes down a couple of cents, they aren't bothered about the volatile history of doge where 30/40/50% swings are the norm.
It has an unlimited supply and a very small amount of people own about 80% of the circulating supply with no development team behind it as they all left, it is a completely useless dead joke. But, hey, they'll learn the hard way. It will go back up before it's finished so some of them may get out, but if you read Reddit then most of them are just going to hold it to the bitter end and watch it go back to nothing, Shiba Inu will do the same.
https://decrypt.co/70344/dogecoin-knockoff-puts-8-billion-in-ethereum-founder-buterins-wallet