Daddy issues. He was trying to achieve a greater crime than his criminal father did. He was seeking fame and notoriety.
Something may have changed recently to make him suicidal, so that his crime didn’t have to include getting away with it. Whatever that was is likely to be a mundane answer.
Simpler than that - no kids - no family - obviously gambled to prove something to himself.
“Daddy issues. He was trying to achieve a greater crime than his criminal father did. He was seeking fame and notoriety.”
A 60+ year old millionaire? I’m skeptical.