This remarkable little coin has had no development for years (which the exchanges love because they don't have to keep updating wallets). It's on all the exchanges, there are never any delays when you send, the fee is trivial, loads of retailers accept it, eg some of the online casinos. And best of all no-one thinks it is a store of value, so people are happy to spend instead of hoarding.
If any coin is going to become a currency as opposed to an asset, it's doge.
Oh my god. Now I have seen it all.
I agree that millions of people use DOGE and it remains as one of the most popular cryptocurrencies (but not one of the largest, in terms of market capitalization). And you agree that DOGE has seen no development for many years now. Those who created this coin (Jackson Palmer and Billy Markus) are not involved in it anymore and they have moved on with other projects.
One of your arguments is true. It's value is not increasing (for obvious reasons) and therefore people find no reason to hoard it. The fee is very low, and therefore it is being used for payments in a lot of online stores. But in order to remain as a currency, it should have some value associated with it. And ideally a coin that is created just for a joke should not be having any.