Simple answer: If you knew the person who died in an accident and they were obviously close enough for you to ask this question because your heart was uneasy about flying, ask yourself this, would that person who died want you to stop flying just because something happened to them?
Odds are, it was a pilot error on their part, I don't think they want you to quit flying because they made a mistake.
However, I do believe when you hit that golden age of 60, just go in to the Transportation office and hand in your license. It's the age to stop and retire a passion, if not, atleast fly with someone else who is capable of landing an aircraft too.