I don't think the banality of evil applies here. Banality of evil is when cogs in a bureaucratic machine don't think about how their actions hurt others, because they are just processing paperwork or following standard operating procedure. Regular people doing regular people things can do great evil.

In this case SBF was the architect and the driving force behind the fraud. He decided to comingle customers funds with business funds. He decided to trick banks into processing client money. He decided to split FTX into dozens of shell corporations to make effective oversight impossible. He decided to operate from Hong Kong and the Bahama's.

Banality of evil might apply to a junior engineer at FTX. It doesn't apply to SBF who masterminded the whole criminal enterprise.

The phrase was coined in reference to Adolf Eichmann.

Yes, but it was coined to promote specific view of Eichmann that he himself tried to cast himself in: that he didn't really like murdering Jews, he was just following orders.

I think your usage/quote was bold but appropriate.

Yes, and "banality of evil" is famously misunderstood:

https://www.haaretz.com/israel-news/2016-10-12/ty-article/th...

(Eichmann was a Nazi through and through, fiercely antisemitic, knew exactly what was going on, and liked it. He didn't just "go along with it" in the banal sense, he chose evil knowingly.)

I never understood it that way. It was just that Eichmann and many other prominent monsters of the Nazi era were polite, cordial and unassuming people when you got them alone. That you could never tell what hideous souls they had because they didn't put it on display. They weren't cackling madmen or vicious savages in their personal lives.

I think that interpretation conflates civility politics and banality of evil.

One axis about decorum and appearance. Those who look and act like "good and decent upper middle class people" always get the benefit of the doubt where others do not, even when that appearance, like with Eichmann, completely falls apart on closer inspection.

The other axis distinguishes between people who have a highly ideological agenda and execute on it (evil) and those who are mostly unthinking cogs in a machine of destruction (banal evil).