I have seen several posts about how ETF and Bakkt could make the crypto market bullish again. As much as I really want the ETF and Bakkt, I really don't believe they will moon cryptocurrency. They will definitely cause the market to be bullish but they won't make cryptos to moon to a new all time high.
What I believe will moon cryptocurrency is the next coming Bitcoin halving.
Looking at the past history and chart of the crypto market, there have only been two halving in history (2012 and 2016) and both resulted in a powerful bullish trend which took coins to a new all time high. The next Bitcoin halving is scheduled for mid 2020, and it will have a powerful bullish trend on the crypto market.
If we consider this logically, it wasn't really the halvings that caused bullish trends. The Bitcoin supply is inflationary -- each halving merely reduces the amount of inflation added to the market. For the price to actually rise, we need constantly growing demand. A halving might factor into someone's decision to buy, but there are a multitude of other reasons that people buy -- for cross-border or censorship-resistant payments, to avoid the banking system/retain privacy, because of the growing network size/utility (Metcalfe's Law), general speculative investment or altcoin investment, to use as currency or in the Lightning Network, etc.
Whether it's an ETF or Bakkt or the halving, people are always trying to rationalize
why other people are buying or selling. The truth is, we have no idea why people buy or sell. Everyone has their own reasons. The halving is somewhere down on the list, but it's not that important.