It is something more like Ripple that is our competitor / plug-in-replacement for Paypal; Bitcoin is our competitor / plug in replacement for the units of account themselves, the fiats, not for the apps that play with them / use them.
To me the promise of Bitcoin has always been that at least to an extent, it can be both. Sacrificing the other side of it is a major compromise and it destroyes many benefits that a universal currency has. Any currency exchange that is needed, is in fact waste. The less of it is needed, the better. Obviously the market will decide what this universal currency is, but the real promise of Bitcoin, to me, has been that it could actually function both as a store of value and a widely used medium of exchange.
Not that the store of value capabilities aren't important, but if it only leads to that Bitcoin will be nothing more than gold 2.0. What I've had in mind for it is gold 2.0 + cash 2.0, and it can't be cash 2.0 if you can't use it conveniently for small amounts.
Obviously if this turns out to be impossible in the long term, to combine the two, then a compromise is needed. I just don't think it's impossible at all.