What nonsense. How many bircoins do you own or use? Does your grocery store , baby sitter, movie theater, restaurant, etc etc take them?
What type of commerce other than drug running and other nefarious things are they used for?
You bought the hype
If you need to get cash to your friend/relative in a foreign country it is basically free & fast (minutes) as opposed to Western Union or a bank wire transfer, etc..
Also, very handy if you live in Venezuela or Greece! ;-)