I am socialy and intelectualy "rich" but cash poor and worried about my old age. What to do at 65?

Old age isn't 65! Old age is a state of mind. Being 65 and socially and intellectually rich is a great place to be. Use those two riches to ask your true friends what they might do in your situation or if they have suggestions for what you could do knowing you. Granted, cash is necessary but security in some fashion may not come from cash but from your social and intellectual riches. Trust them!