That might be so, but transferring real-world money into one (a requirement until value stabilizes †) is not nearly as simple.
> It's by design that so few people in the world have a bank account, but anyone with an internet connection can get a Bitcoin wallet.
This reads a little funny when you remember that far fewer people in the world have a Bitcoin wallet. Could this be a mere matter of implementation of the design?
† IDR-USD moved 1.6% in the past month, Bitcoin-USD moved 19%