While I agree with most commenters here that are skeptical about a surveillance-based currency, I'm very positive about the idea of having mainstream apps such as Whatsapp and Messenger introduce the concept of paying with your phone without needing to link your accounts with any bank account or debit/credit card, because the money is in theory being held by your device (under the hood, just holding a private key of a "blockchain" account that has a non-decentralized-stablecoin balance, I know).
This will enable people to start thinking of money in a more pseudo-P2P way, get comfortable with it, and in turn allow them to start understanding better what cryptocurrencies really are (which Libra is not). What cryptocurrency and Libra share is, at least, the concept of ownership via public/private key cryptography, as opposed to identity-based systems such as paypal/banks/credit/debit. This has some UX-side-effects that people will start to learn, such as the push vs pull system (e.g. it's not anymore the merchant who scans your QR code, but the other way around, the customer scans the merchant's payment-info).