A conditional "-(으)면" plus 버티다, "hold out, endure, stay put". It weighs whether you can last: if it's daytime when I arrive I stay up, at this level I could stand it, if you earn enough you can hold on, most people can hold out. It also means simply refusing to budge — one line is about someone who just plants himself and won't do it. Note that 버티다 is enduring in place, unlike 참다, which is restraining an impulse.