I think Dogecoin should go PoS... the sooner the better. This is to protect it's investors. Because if the price is continuing to go down, in not so distant future it would be trivial to make 51% attack.
Really , how much do you know about PoS and it's vulnerability?
And what about the 51% attack against doge? Do you know how much it will cost?
It will be far cheaper to attack a full PoS coin.
PoW is more easily to attack because you don't even need to buy the hardware to make the 51% attack, you just can rent it for 1 day make the 51% attack and be gone.
But if you try to buy 51% of the coins to make 51% attack on PoS... that is just insane... it is much harder to do and you can't do it fast.
Look on coinmarketcap the top 10 coins and tell me how many of them are pure PoW?!
Dogecoin is more flexible than the old behemoths (Litecoin and Bitcoin), so the transition to PoS would be much more easier.