If you look at the Bitcoin richlist you will see that none of the top 20 adresses have moved/sold any btc last month! In fact most of them have bought/accumulated even more BTC this week. Most of the top 500 adresses also didnt moved/sold any btc and only bought. Take a look youself:
https://bitinfocharts.com/top-100-richest-bitcoin-addresses.html
The bitcoin rich seem to only accumulate more of that sweet magic internet money.
My guess i that this dip is just a normal market correction leveraged by by FUD. Don't panic people, the tech is still the same and Bitcoin is working fine as always :)