Not even like that. The currency cannot collapse in any way, let alone disappear or be stopped. It's a technology, how can you devalue the technology? That's right, creating something more innovative, but I doubt it will happen in the next couple hundred years.
I agree with you when you say that you can't devalue the technology, but have to disagree about the timeline: I think the next breakthrough can happen sooner. Think 100 years back and compare technologies to currents ones we have. It's a geometrical progressions and quantum leaps.