Speculation is that this is primarily due to Bitmain's announcement yesterday to hard fork if the UASF soft fork gets any momentum. Jimmy Song has a good analysis on this.
https://medium.com/@jimmysong/examining-bitmains-press-relea...
This forking of Bitcoin is a required trial that the chain must go through to prove how resilient it is to this type of attack. It is unknown which chain will win in the event of a fork, maybe Ethereum will win, probably not PotCoin.