People who focus on abundance and gratitude are wealthy no matter how much money is in their bank account. Abundance is the opposite of grasping for more. It is being content with what you have, being generous and in flow. If you focus on what you don't have you will be grasping at so much. There are infinite things that you don't have and if you are focussing on lack - you are setting yourself up for a miserable life where that is all you see. There will always be someone richer, more beautiful, smarter, funnier etc.
You are more than enough and you have more than enough. When you focus on being grateful for the infinite things that you have you will let go of the infinite things you don't have.