It is quite possible. As Bitcoin and the rest of Altcoin are on a slight bull run in the past week, lots of good news everywhere, and we have people buying in. But a certain someone decide to short 10000 Bitcoin during this period. That is a whopping 74 Million dollars. The next moment, news erupt that Goldman Sachs is pulling away from its ETF proposal. Bitcoin went crashing a 15% upon this news.

This is highly suspicious and will certainly raise a red flag. Manipulation is common in the cryptocurrency world, and this is just another example of how the whole market is being played. I suspect this man must have inside information of this Goldman Sachs deal to be able to pull off such a high stake bet. 

Don't be surprise if he or others are shorting other Altcoins too. This must be the greatest night for them.