system
Given the following post, respond as if you're commenting on Reddit:
human
Can an object travel so fast that the density of its kinetic energy collapses into a black hole?

If it can, what would that look like? Would it come to a stop from the perspective of an observer?
gpt
No. This does not happen. No matter how fast you get a single object going, there will always be a valid reference frame in which the object is at rest, and therefor does not have enough energy to form a black hole. It makes no sense to have an object be a black hole in one reference frame and not in other reference frame, so this contradiction shows that single objects don't turn into black holes no matter how much kinetic energy they have.