If you think a bit bigger and imagine a worldwide audience (basically the defining feature of whatsapp), the initial killer apps here are remittances and the ability to build out marketplaces and stores. Assume the goal is global wechat-like commerce. IMHO this is huge. The regulatory interactions will be formidable because every country will want to get its fingers into this, money and who gets it is ultimately poli…
What makes it so huge in your opinion? PayPal and Venmo and the like already make this very easy, internationally there are some challenges, but it’s not technical limitations so much as legal/compliance which doesn’t go away with blockchain.
They make it easy because they abstract away the underlying mechanics. Novi for WhatsApp does the same, but for a much, much larger audience, and does so instantly. While it isn't shackled by the baggage of the financial industry born in an era far removed from the current one, the pace of improvements and deployments can be much faster in face of changing regulations, jurisdictions, and technology itself.