51% attack is not so easy to be made.
Dogecoin is based on brand new litecoin source so its not so like in "early" years.
It's a scrypt coin nothing else.
If the price doesn't follow the hash increase miners will quit and those who aim at the 51% will remain , even mining at a loss until they make most of the hash rate
You don't need to throw 10 000 gaw miners at the chain at once , do it slowly and you'll manage the same with far less costs.
The question is , why do it at all?
There are two big scrypt-coins: Litecoin and Dogecoin. The scrypt Asic makers are taking big risks to be in that business, because their machines will be worth a lot less if Litecoin was to crash and never recover. However, Dogecoin is a blessing for them, since it is an hedge against Litecoin failing (which imho is quite likely, since it doesn't offer anything that Bitcoin doesn't).
Since those who have that much hash-power are more than likely directly affiliated with one of the ASIC manufacturers (Gridseed, Gaw, etc.), it would be incredibly stupid and useless for them to destroy their hedge that Dogecoin is.
