When one possesses more wealth than necessary, he certainly becomes very proud. i Wherever there is money, it must be engaged in the service of Lord Narayana. Everyone should use his money to spread the great transcendental movement of Krsna consciousness. If one does not spend money for this purpose but accumulates more than necessary, he will certainly become proud of the money he illegally possesses. The money actually belongs to Krsna, who says in Bhagavad-gita (5.29), bhoktaram yajna-tapasam sarva-loka-mahesvaram: "I am the true enjoyer of sacrifices and penances, and I am the owner of all the planets." Therefore nothing belongs to anyone but Krsna. One who possesses more money than he needs should spend it for
Krsna. Unless one does so, he will become puffed up because of his false possessions, and therefore he will be punished in the next life, as described herein.

Srila Prabhupada, SB 5.26.36 ppt.