Two kinds of people (pagans vs. disciples)
It is the normal human tendency to try to accumulate material objects and net worth on earth. As we amass wealth, we can see and enjoy our earthly comforts with our natural senses; however Jesus admonishes us not to store up earthly treasure, but rather to seek to make deposits in an invisible heavenly account, where it is not only secure from the elements, but it will accumulate genuine benefits. Even in the best investments on earth, all material objects will ultimately be lost.
Since serving God necessarily rules out serving money, it follows that, as a result, the one who serves God can trust God’s promise that they need not be anxious about anything – even the most basic things which money buys – food and clothing. The practical application of serving God and living for invisible, eternal treasures is that we know by faith that God will meet all of our physical needs as we set our priorities on His kingdom and righteousness. If we serve money, we walk by sight trusting in what is seen, but if we serve God, we walk by faith that God is just and will rightly recompense those who lay up their treasure in heaven. Where does your eye, your heart, your treasure lie?