Ideally, don’t be so busy about the future. There’s a reason we don’t know the future, it’s nice of our business. Relying on Hashem that He takes care of and runs the world, does not mean that it will be the way we design it in our imagination.
The past and the future are in Hashem’s hand. The present is in our hands. Be pragmatic and realistic now and do for the future in the framework of the present. Past that, the future is in Hashem’s hands.