Don't get me wrong, I don't want my online banking in Snapchat. But sending money to friends is a very different action - it's inherently public, for one.
Public? It is a private transaction between two parties. This is why I don't understand Venmo's interface that tells me about transactions that I'm not involved in. I always set my payments to private, admittedly it does make for an interesting feed to browse for those who transact publicly.
Don't get me wrong, I don't want my online banking in Snapchat. But sending money to friends is a very different action - it's inherently public, for one.