I believe that each day is special and that I should live that day to its fullest. So keep on quilting! Who knows how long any of us have left to live????
However, I would suggest that in your personal papers (ie will, POA, etc...) that you leave instructions for your heirs as to how you want the leftovers (yes I call them leftovers) distributed. Family members who quilt, Guilds, a quilting friend, church quilters, Project Linus....
Now go to your stash and make a quick, lovely project- Hopefully that will inspire you to do some great things.