It's true that Bitcoin is a poor medium of exchange: it's not stable, has slow transaction times, does not work well with mobile devices, and has intimidating identifiers, but it did open the door to new ideas that will likely soon have a huge impact on exactly the uses you're describing.
I feel like I've been hearing this for over 5 years. I hope it materializes, but to be honest it's hard to not be skeptical, not in the least because a lot of the original values of Bitcoin/cryptocurrencies seem to have been subverted by certain people to serve their own needs (which ... is what usually happens if there are no rules to set boundaries).
I'm a little biased, but check out celo.org and valoraapp.com. Celo is a Proof of Stake protocol built to work efficiently on mobile, with stable value, and with phone numbers as identifiers.
