Adoption is spreading and I have data I wish I could post here. Look up actual data on how many new users are on blockchain. Verified users* it almost mirrors the dotcom first few years.
The reason why this comparison is flawed and we likely have a lot more room to fall....stocks can be valued, cryptos, cannot. Over +1500 crypto-coins and no one can give me a good reason to own '1' -- expect to gamble (the reasons why 99% of people own it). It's an easy short.
Wrote on 8/9/18: "Just to reiterate my current view on Bitcoin , right now $5,800 is the level to watch. If it can't hold this level and sustain a run from there ( volume will be key to monitor), in all likelihood, Bitcoin will test ~$3K."
If you want to say that stock value can be measured, then yes - but only by their current assets and the current value of the company / the number of shares. That would be an exact. These current market prices have and always will be based on future speculation much like cryptocurrency adoption.
Internet value couldn't be measured in the beginning because there was very little adoption, it was expensive to use, and it was slow. However, investing in projects positioned for growth in internet's future would have been extremely beneficial to your portfolio in 1991.
My point is that cryptocurrency and blockchain project value can be measured by level of demand in relation to supply like everything with value. When a new method of process or improvement to the existing norm is created, it has the ability to dramatically increase demand. When supply is limited, the price increases with demand. Stocks are no different.
Baseball cards have zero use-case value, however certain cards are in limited supply, and the demand is high - thus their price goes up.