It depends - is the promotion worth it? Is it worth working 60 hours a week? There's more to life than work.

Also, if you get a reputation as a 60 hour worker that's going to be your expectation. After promotion that's going to be the expected schedule. The promotion after that will be the same. The point is you're not just working 60 until the next promotion. You'll probably end up working 60 for the next 10-20 years.

If that's ok with you, and that's what you want, then that's fine.

Another kicker: a company can fire you at pretty much any time and for any reason. Why pour yourself into an enterprise that can toss you aside at any moment?