...only if they are listed on exchanges, if not they are just a pile of garbage...
Seems to me, that comment missed the entire point of crypto (unless I'm misreading it). Does a currency
have to be purchased through 3rd, 4th, and 5th parties to have value? Doesn't that make it more of a stricter commodity asset and not an actual currency? Do you purchase your daily-use currency (i.e, USD, Euro, etc.) on an exchange or do you trade goods, services, and/or work in order to receive it?
No, it doesn't
have to be purchased on a formal exchange to have value... but if it
does have value a couple months into its lifetime, then it
will be on an exchange, because people want the convenience of a formal exchange.
So it's a good indicator.
I don't purchase my daily-use currency on an exchange... but it
is traded on exchanges, as are nearly all daily-use currencies. And whenever I trade goods/services/work with others who use different daily-use currencies, our interactions always go through one or more exchanges, whether we're directly involved, or not. I don't want to limit my interactions to only those employers/merchants/partners who use my preferred currency.