First off, love the steemit shirt you have. Where did you get it?
Agree with your contention and currencies in general not having intrinsic value is a very strong argument for crypto currency.
I'm not a history or economics buff, but imagine once widespread, fungible currency was available it's value was based on how much existed in society and what people decided it was worth, not anything intrinsic. When people would only barter there was no real currency: a horse is not equal to another horse, a lack of fungibility destroys a currency's efficacy. Gold was a useful one, but it's too rare and too heavy for use compared to cheaper metals.
Anyway, now I'm ranting about stuff I'm not well versed in, time to stop. Enjoyed the video and how it applies to crypto
Thanks for your comments. :) I got the shirt here: https://amzn.com/B01IL0V9CS