From Wikipedia
In April 1977 Panthers were key supporters of the 504 Sit-ins, the longest of which was the 25-day occupation of the San Francisco Federal Building by over 120 people with disabilities. Panthers provided daily home-cooked meals in support of the protest’s eventual success, which eventually led to the Americans with Disabilities Act (ADA)thirteen years later.
They aren’t only using the value of their assets. Their assets grow there are dividends, there are payouts.
There’s income. They don’t have their money in checking account with no interest paid.