I had felt the volumes had been getting very mushy since the middle of January, turns out there may be some math behind it indicating that more than a few exchanges have been playing with the numbers. So if you are seeing double and triple buys/sells where you think the volume should handle it (except spot buy/sells), maybe you are on a exchange that is "adjusting" their volume amounts.

ref.
https://news.bitcoin.com/study-finds-3b-worth-of-faked-cryptocurrency-volumes-and-wash-trades/

In my opinion, I believe there is validity in the article but it does come off as a low ball pro-Binance ad. Another thing is it casts Poloniex which is currently problematic in itself and Bittrex (who has slid 6 positions in the last week)  in the same light.

"The study also looked at exchanges like Bittrex, Hitbtc, and Binance against “respectable” exchanges." -Without explanation or back story, which comes off as a paid-for op-ed by zc.

At any rate I am glad someone is looking at the numbers, hopefully someone else will come a long and "fact check" them.  I had a feeling..