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?
Capitalism cannot persist forever. Take it as a law of the universe. Capitalism is a relatively new thing and at some point, it will end. Humans have existed most of the time without capitalism. Just because something doesn't or can't change within your lifetime, doesn't mean it's forever.