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.