Well, if you understand why blockchain will (is supposed) change the world then you're halfway there with regards to understanding the narrative:
In simple terms, a blockchain is a decentralized ledger where transactions are verified by a whole bunch of people. These people don't work for free, so you have to pay them.
So if you want to use a specific blockchain, you need to buy its token and for each transaction you have to pay a fee in tokens to the people who verify transactions.
The more people are using a specific blockchain, the more demand there is for its token.
If you take Bitcoin as an example you need to purchase Bitcoin in order to use the Bitcoin blockchain to transact. You pay the miners (who verify the transaction) a fraction of your transaction as a fee. So if you want to establish a fair value, you take the production price (aka the amount of electricity it takes to mine one block x times price per kwh) and compare it to the amount of transaction fees you can generate with it times price (the cashflow you were looking for).
So if you look at crypto from this angle (how much cashflow does a blockchain generate vs. how much effort/risk there is associated with it), these protocolls are actually easier to evaluate than all those bullshit US-GAAP balance sheets of equities...and the numbers are public, out there for everyone to see without any delay/gatekeepers
so it's valuing atm fees?