With Russia temporarily halting manned missions after the latest Progress failure, there's no way to get people to the ISS (the station does have Soyuz-based lifeboats).
This is why we need to get the manned version of Dragon flying.
And as many others as we can manage. We can't keep relying on one system to get people into space - because accidents are always going to happen. (This, by the way, is why I think NASA is doing the right thing going with commercial systems - it allows for variety and, thus, greater safety and efficiency).
And then we need to get working on alternate launch systems. Access to space may seem to be an expensive luxury, but I firmly believe it's a key part of our future.