a 2004 cavalier depreciates and is a tool, not an investment. it's already lost a lot of value and will lose more as time passes.
spend money on preventive maintenance to keep it safe and avoid big problems in the future, but no extras.
legally the shares are not worthless until cancelled.
trading in gmgmq is, i think, just specualtion based on the possibility that current shareholders will get a piece of the re-organized company. not bloody likely.