Bitcoin is still a controversial currency to a lot of traders, especially to the conventional ones! Today is the first day of bakkt I don't know from where did you get the figure of 7 btc only. The instagram link you have shared, did not talk about the volume!

I am still very optimistic about Bakkt because no other exchange offers physically settled bitcoin future contracts! It may take its own sweet time but eventually Bakkt will become a major volume driver in the crypto market.