It raises a major question though, Bakkt converts people's coins to fiat, then uses that fiat to settle the Starbucks payment. Isn't that a taxable event within the US? Don't forget that this is just the very beginning. At one point I do expect a large number of multinationals to participate, and the amounts concerned will greatly exceed that of a coffee and a muffin.

In the end, it's more of an empty marketing gimmick than something that provides much usefulness, especially if turns out that you must have an account with Bakkt in order to utilize that payment option.