Comment by Eleutheria

Here are the deficiencies of bitcoin. I know they will be rebutted till exhaustion but they're deficiencies nonetheless.

    - 20 million
    - eight decimals
    - blockchain size
    - cryptic account ids
    - QR codes
    - price instability
    - latency
    - privacy
    - reach

The typical responses will be

    "that's a feature not a bug" 
    "you'll get used to decimals" 
    "qr codes are not that hard" 
    "in a decade everybody will have a petabyte in their phones"
    "ten minutes is not that long"
    "who needs privacy if they're not doing anything wrong"
    "to the moon!"

And that's the precise state in which a disrupting technology hits you with your pants down.

Blindness.