That window may be open for a long time — and hopefully it is — but it also may be open for a short time. I think the wise move is to make life multiplanetary while we can.
SpaceX and Tesla founder to Space
SpaceX and Tesla founder, Elon Musk, says that humanity needs to seize this particular moment to colonize Mars. He believes that the necessary conditions have aligned and it's possible it could happen in the near future, though probably not in his own lifetime.
Speaking at the annual winter meeting of the American Geophysical Union, Musk urged the crowd to support the massive undertaking because, "There need to be things that people look forward to when we wake up in the morning." He went on to say that the mission would greatly advance science and technology, while giving humans another option in the event of a catastrophe on Earth.