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.
Strong argument, I have nothing against it. As well as in 2016 the real bullish trend has been started since the halving and there is no doubt - history will repeat itself.