Therefore do not worry about tomorrow, for tomorrow will worry about itself. Each day has enough trouble of its own.
Jesus’s words here have to be taken in context. He is talking about both avoiding the love of money, and trusting completely in the Father’s provision as one is seeking first God’s kingdom and righteousness with the promise that all of one’s needs will be met.
Go to the most wealthy. They too will die, and it’s not as if their lives are free of problems, or even that money will get themselves out of any and every trouble. It is true that plenty of money helps mitigate a host of problems and that the rich should be sensitive to the poor whose resources are sometimes not enough to get them through adversity. All of this is surely part of what Jesus is getting at, considering all he says here and elsewhere, and all Scripture tells us.
To the words quoted above: Jesus is making a point. He is certainly not telling anyone to not plan for the future. That would contradict other Scripture, and Jesus is not going to do that. The point is that in our trust of the Father, we deal with what is in front of us today. We have responsibilities and tasks and likely some either lingering or new problem to deal with today. Tomorrow will bring on some new situation, entirely out of our view now. We’re not to fret about yesterday or tomorrow, but deal with today and the task at hand.
The thought on trouble is a helpful one. Christians, followers of Jesus are not set free from trouble of any and every kind. We’re set up for disillusionment to think otherwise. It is helpful for us to accept all of that as a part of this life. And hold on to the truth that God is faithful in all of it, and will see us through to the end, even through death itself.
So we can deal with the problems today without preconceived notions as to how everything must turn out. Instead accepting what comes our way with the consequences. As we learn to trust our Father more and more in and through Jesus.