So, he is just joking with the jokecoin doge
There should be some balance between supply and demand. The higher the price of Doge gets the more people will mine it.
With higher supply price will fall and people will start mining something else more profitable. Until some reasonable equilibrium is reached.
Still with many other coins worth 100s of dollars I feel the upside for Doge is still far greater than downside.
Once the train started moving up from hundredths of cents price (which it stayed at for years) I just don't see it coming back to same levels and dying.
People wouldn't sell their coins for such a low price when they bought them for 50-70 cents. It would be peanuts so makes more sense just to hold on to them in case it ever goes up again. And if no-one sells that low - price will not go that low.
So while a correction to 20-30 cents may still be possible I don't think it can go much lower than that. But upside is possibly still massive.
Just my opinion.