Dude, kinetic travel through space to another star system is insane. There is a 100% chance of catastrophic destruction from debris. At the required speeds even atoms will ablate the craft to nothing over such distances.
Luckily we’ll never have to worry about that because we can’t actually accelerate anything that fast.
It’s theoretically possible that we could find some other way to travel FTL, like warp drives, or wormholes, but there is no way we can just keep our foot on the gas and get to that speed in the conventional way.