Everybody assumes that an PoW attacker should invest in hardware before the attack... no he should not. He would just use his Litecoin ASICs for 1 day and 1 attack on Doge. This is all it gets... it can happen tomorrow virtually at no cost for the attacker.

 Also he can attack as long as he wants... and we can't do anything. We can reverse the blockchain but he can attack again and again.

 Should we be forced by an attacker to go PoS?!

We should go PoS in a controlled way. That would be best for all, miners and investors.