Turns out my estimations of the Lightning Network's growth were underrated, I was using an outdated explorer that was listing less nodes, use this explorer for the updated amount of nodes:

https://rompert.com/recksplorer/

This is the old url:

https://lnmainnet.gaben.win/

Notice how there's 300 new LN nodes in the other url that the old url is not caching.

LN seems to be growing pretty fast, it will eventually go parabolic once it's easier to run. Right now (I think) you need a full Bitcoin node to run a node, but eventually they will make it so anyone can run an LN node without running a full Bitcoin node.

By 2021 I predict big companies like Steam, eBay or even Amazon starting to accept Bitcoin payments through a much more robust and user friendly LN. Coupled with the store of value properties which will remain as solid as always, the combination will make the price go beyond $100,000.