I am going to throw you another curve ball. What if the amount spent on transactions is very tiny compared to the savings piled into investment, but the economic value of those transactions is orders-of-magnitude more valuable than the investment in the tokens. This is very possible. Observe me show you how it is done with
my project OpenShare.
Why would someone spend or part with something that is increasing in value?
What part of trading miniscule transaction amounts for much larger value did you not understand?
The curve ball is that the value exchanged in non-fungible, i.e. isn't directly monetized. For example, paying 0.1 BTC per month to be able to publish your academic papers. The value enabled is much more than the value transferred monetarily. Now imagine blockchains open new markets of value which didn't exist before. Voila! Bitcoin destroyed. Watch it happen.