It is only 13 days remained for SegWit proposal to run, August 1st.
I thinks one major reason for Bitcoin price decline is the SegWit proposal.
Bitcoin reached to its minimum price after few months growth.
We have to wait and see what will be happened by August 1st for very first blockchian and cryptocurrency.
Source:
https://en.bitcoin.it/wiki/Segwit_support
Image Source:
https://s.tradingview.com/x/sT4wa32d/
https://crushthestreet.com/articles/digital-currencies/prepare-bitcoins-potential-chain-split-august-1st-2017-eric-grisholm