Body consists of matters which dissolve in time to their original form. But Self has no dissolution. You have come for a few days not forever. One has no right to put a violent end to one's own life. Live the normal term of life doing your work, without coveting the wealth of others and enjoying Him.
Individuals have no existence of their own because exit from their mortal body is inescapable.
That which holds the body will return to its own abode when it leaves the body. The reality of the mortal individual is then merged in that eternal and continuous Life Force which never moves from or to any place. When God leaves the body He does not go anywhere. Such rites are only for mercenary interest. The deceased for whom we perform rites receives nothing.