Not according to folks involved . . . unless you are including the Mafia as part of the crew ordered by the oligarchy—long in cahoots with them.
Actually there is lots of evidence that the Outfit was behind the killing. Mafia lawyers have admitted roles in setting it up and remarks by Marcello, Traficante and Giancana admit their involvement. They could all be liars.
Of all those one could suspect of doing the job the Rothschilds are about as far down as one can go. JFK could do nothing unilaterally against the Fed, changes would have to be from the Congress.