Dogecoin has unlimited supply. It had an unexpected pump lately, but I would not advise anybody invest in it, sorry; it may be a trap.
As a general rule, I don’t usually recommend investing in something that is openly a joke. But it certainly doesn’t mean that Dogecoin is dead; there is still a thriving Dogecoin community.
I agree with you for BITCOIN that is still the "safer" place to go but I would never invest in Dogecoin. It's a coin where the founder said some times ago that is was created like a joke, so I think there's no any good future for this.
This is not necessarily a bad thing, and crypto can survive with ease even without its creator’s support. Bitcoin is the living proof of that.