I have great sympathy for this coin, considering that it was the first one I encountered in the world of cryptocurrencies, which not only survived to this day, but also has great support from the community.
On the one hand, some criticize its unlimited supply, but on the other hand, I agree with @philipma1957 that miners are the ones who have great credit for this coin being still popular. If mining stopped for some reason, I think DOGE would lose a lot, because let's look at what happened to ETH after it switched to PoS.
As for the ETF for this coin, it is possible that its price will increase slightly because of this, but my opinion is that the price will not explode as some imagine.