It's now 2020, where many exciting events are yet to come. Bitcoin will experience another reduction in its block reward (halving), while Ethereum becomes closer to adopting PoS into its blockchain network. The space is definitely maturing, but the level of demand is still a lot less than it was back in 2017.
Nonetheless, I'm curious to know what's the next big thing in crypto?
I think that we'll just see a wave of institutional adoption in 2020 as opposed to any real new innovations. This is due to the fact that there were simply so much institutional interest at the start of 2019, with a bunch of investment banks expressing their willingness to dabble in the crypto markets.
That means that I think large caps will likely benefit more from the bull run rather than innovative ICOs, which can be seen to be more risky.
But the one area that I think will be of interest could potentially be IoT, dominated currently by IOTA and IOST. Especially with the slim to none transaction fees and the scalability promises.