I agree it’s implausible but something is going on here. I don’t buy that all these high-finance types have suddenly decided to off themselves. This isn’t a bunch of middle school girls in a copy-cat suicide ring.
My uneducated guess is that these deaths are serving as a warning to everyone else involved in the destruction of the US dollar. No one who values their life will feel motivated to reveal the details of any anomalies they might observe in the currency and commodity markets in the near future.
Maybe there’s a Star Chamber at work, under the realization that these people are immune to the normal consequences of criminal behavior.