One way time travel opportunity. Would you go?

The consensus among theorists, is that it would be be a different universe, or time/space. That it would have it's own path, and this one would continue. (regarding going back and making changes)

That this may or may not affect the 'ultimate' lifespan of the given universe in front of us now.

What exactly is infinity, anyway?

Is our mental reach, limit, and conceptual logic surrounding such...valid or invalid in this case?