The most useful thing wormholes could be used for is hypercomputers (if causality can be violated); or simply bypassing the Bekenstein bound with FTL communicat

The most useful thing wormholes could be used for is hypercomputers (if causality can be violated); or simply bypassing the Bekenstein bound with FTL communication in a processor exceeding the mass that would turn it into a black hole if it was spatially adjacent; or building an interstellar network that could survive the big rip. Anything that mastered wormhole creation is also likely to expand into the universe at close to the speed of light with wormhole-carrying Von Neumann probes, making the Fermi paradox even more extreme if wormholes can be created.