It's the only way if you are inclined to keep working. I am not, myself, but The Lovely and Talented Mrs. C, younger, better looking and more energetic than me, is. Find a need and fill it. Make it easy for customers to pay.
"We accept payment in cash, check and credit cards."
"We also accept payment in gold, silver, furs, lumber, ammunition, moose, venison, fish, crab, labor or other valuable consideration"
No thanks. I started working at the age of 12. Worked hard all my life. Retired to take care of my Dad after his stroke.
Keep busy preparing for hard times, gardening, and researching -not inclined to start a new company at age 75 -almost-but hubby said the pantry was beginning to look more like a warehouse. Ha. Kids will have a good stash to help them out when I am pushing up daisies.