I think what many people are missing is that it may not be a good currency for small purchases but for moving very large sums of money it can be very convenient.
There are no instruments in the world today that would allow you to move from $1,000,000 up and up by fitting it easily and discretely into your pocket. Could be a smartphone, USB drive, or a san disk.
People in the west forget that like 85% of the world live in very corrupt countries where confiscation of property/wealth is real. If you want to get your money out of said countries this is the best way to do it hands down!
Not if you read Satoshi’s original paper on the topic!