doesn't seem to matter what kind of crisis occurs, there's always something new for capital to continue its exploitation. for example, is it possible that in the nick of time, capital will discover cheap fusion and just use that to avoid total climate catastrophe in some way?
Dunno. Feudalism lasted for a thousand years, even with mercantile city states constantly threatening it. Capitalism has lasted give or take a couple hundred years thus far and it's already going to absolute shit.