Even assuming it's true that Epstein didn't take his own life, SBF holds nowhere near the level of significance to justify such actions. The matters he's been associated with pale in comparison to Epstein and the potential political fallout is extremely minor in comparison.
The grim, yet in all probability accurate, reality is that confronting the prospect of spending numerous decades incarcerated is an exceedingly tough pill to swallow, particularly for individuals who've enjoyed rather comfortable existences and anticipated its continuation.
If, by any chance, we find SBF in a cell dead it's significantly more probable that this is the underlying cause.