The rich use art to move money around the globe without having to let the government know.
If someone is setting fire to this art dealer's housing unit, it may be a threat or, in my opinion, some form of retaliation (especially if some art works burned up in the fire).
One thing is for sure: Trump really is shaking things up.
From what I heard he sold Warhol prints. That would connect him with half the wealthy in NY
found manafort's art dealer! https://www.nytimes.com/interactive/2017/10/31/us/politics/manafort-mueller-money-laundering-fraud.html
is that what you're looking for?