The laws of physics prevents us from going faster. Even if we could travel at the speed of light time is effected and would move more slowly while traveling. So one year at the speed of light might be 10 or 100 for people on earth. I don’t know the exact numbers. I think we are approaching it from the wrong way. It’s not speed that we need to figure out it is bending space around us. This way we can traverse large distances in an instant and will not need to worry about travel time.