i think with all the new FUD in the market (news - what new there, lets called it downer news?, credit card bans, countries banning cryptocurrencies).
The "interesting" part is that the volume is pretty high on certain points, so guess who is buying ?
Yeah right the ones how will sell to you afterwards.
A hint can also be seen here https://bitinfocharts.com/top-100-richest-bitcoin-addresses.html ( seems like all increased their holdings in BTC significantly).