Unfortunately, on earth there is such a scarcity of gold that the goverments of the world try to keep it in reserve and issue paper currency. Because that currency is not backed up by gold, the paper they distribute as money is worthless, but nevertheless the people on earth are very proud of material advancement.
The human life is meant for attaining eternal and unlimited happiness by spiritual realization.
Srimad Bhagavatam 1.3.13
You are driving car, running with seventy miles speed.. it is smashed accidently. But you are alive then you have to change your car. Similarly, we can drive this machine called the body for so many years; then it becomes old and we have to change it for another machine. This is the process of birth and death.
According to our purpose, Motivation & Sincerity Krishna reveals himself to us.