Health………………
and who made you the arbiter of which Supreme Court Justice can judge? Your use of the word ‘can’ is just plain wrong. Justice RBG can judge any case that comes before the SCOTUS. Can is a physical ability. As to whether or not RBG should hear/judge a case involving Trump is a different question.
Personally, I believe RBG has the ability to separate her disdain for Trump from the facts and issues in any case over which she might preside.
Furthermore, though Trump has many court trials ahead of him involving his associated companies or himself, it is doubtful that any would have issues that could rise to an appeal reaching the SCOTUS. Most are contract issues and it is extremely rare for for decisions in that kind of case to be appealed more than one level above the trial court. In fact Trump has a history of settling most cases rather than enduring a trial complete to verdict and award.