Wow - congrats on growing an impressive old plant. I do think the plant is pot bound and would like a larger container but I know that transplanting a jade can be risky. To perk up your plant add some Osmocote on top of the soil but use only one fourth of a teaspoon. Work this into the soil gently with a plastic fork. Add one half inch of top soil over the Osmocote and water in. You should see signs of healthy new growth in a month or so. Keep growing, Marianne Binetti