Weakness across the cryptosphere. I believe lead by uncertainty on the the UASF and tensions with large miner pools. Segwit and Lightning networks are the next round of innovation for Bitcoin. I feel that the blocksize is a nonissue for HODLers. Blocksize increases will NOT allow us to exceed 9 transactions per second, so there is no way that Bitcoin can be shoehorned in to the roll of Payment Channel ala Visa / Master Card (2000 tps). We must focus on this, and how cryptocurrency allows value transference. The evolution of the platform, with side chains allowing off chain processing and settlement back to the blockchain is where the next round of applications and use scenarios will unfold.

Ultimately ETH will take flak for Bitcoin, until it can stand on it's own. segwit and Lightning networks allow atomic cross chain swaps so we should see some chaotic oscillations until more harmony emerges brought about by arbitrage and traders smoothing out fluctuations.

There is a slight danger of a Bitcoin hardfork and an orphan chain. This could be largely bullish for Ethereum and the ecosystem of ERC20 tokens. Those who have their bitcoins in private wallets will be OK, those with coins on exchanges will be dependent on how the political game unfolds. ETC was never supposed to exist and yet was ushered into existence by Poloniex and a few other exchanges. This caught Coinbase by surprise. History doesn't have to repeat though it may rhyme...