When you get old, if you need skilled nursing care at home or in a nursing home, that's your dime.
Typically, you get admitted to a nursing home, spend all of your money, and when you run out go to Medicaid. Your county DSS will liquidate your home and remaining assets and you'll be paid for by that until you die.
If you have a surviving spouse, they get to keep some allowance.
https://www.medicare.gov/what-medicare-covers/part-a/what-pa...
Nursing home: https://www.elderlawanswers.com/medicares-limited-nursing-ho...
Home care: https://www.medicare.gov/coverage/home-health-services.html
Activities of daily living: "Activities of daily living (ADL) are routine activities that people tend do every day without needing assistance. There are six basic ADLs: eating, bathing, dressing, toileting, transferring (walking) and continence."