Just for a short comment and Idea for recording.
What can be compared to find the value of whole Ethereum system?
I think Ethereum is Android or iOS for Crypto currency.
And DApps are applications for that.
Some of DApps will be a Facebook or Snap in this world.
After billions of people start to use it, people should pay more to use this DApps.
We are buying shares of Android of this world.
Ah, surely Ethereum can be a Symbian OS, not Android.
Who knows?