Seeing yourself getting old or an elderly person in a dream has different meanings in Islam depending upon the context and situation.
1- According to Ibn Sirin رحمة الله عليه the greatest dream interpreter of Islam, if a young man sees that he got old with white or grey hair, it means that he would attain respect and status.
2- Seeing an unknown happy elderly person in a dream means that a friend of the dreamer would make his wishes come true and he would come out of sadness and sorrow.
3- Seeing a known elderly happy person in a dream means that that old person shall grant him something.
4- Seeing a known unhappy elderly person in a dream means that the old person would take something from the dreamer.
5- According to Jabar Maghrabi رحمة الله عليه if an elderly person sees that he has become young in a dream, it means a decline in his wealth, respect and status.