They seem to be "Institutional investors are trying to seize the dip! to buy more
These traders are trading futures, and there's nothing in that article that indicates that they're betting on higher prices. They could just as easily be betting on a *lower* price. Plus those futures contracts might not even be settled with actual bitcoin. Most futures traders don't want the underlying asset, and this is true in the commodities market as one example. They just want to bet on the direction of the price of whatever it is they're trading.
Seems like these traders are on work now with BAKKT, the last time I checked the future contracts on BAKKT last month it was just about 400 to 500 contracts daily. Yeah, most people are just riding this since this project has a lot of incoming settlements.
I also don't think this trading is affecting bitcoin in any way. All of these are transactions that don't happen on an exchange that contributes to the reported price, so I'm not really sure this story has any real significance other than the fact that Bakkt might be getting more successful. That's a good thing but it isn't a huge news item.
Every event in the market has a bearing on the bitcoin's price although it was not deliberately done in exchange it does not mean it has no effect on the bitcoin. This probably caused the recent price dump on bitcoin, more or less $1000 has been decreased on the bitcoin price this week. What I'm afraid of these happenings is the other cash-settlement implementation of bitcoin features that will start this december.
Having that said, all we can do is to take granted of the decreasing value of bitcoin without forgetting BAKKT.