The top trading firms in the world treat Bitcoin markets as an ancillary project to give to summer interns -- the actual trading floor doesn't give it any thought at all.
Sources or potential sources? That makes a huge difference. A potential source that something is true means nothing. A source at one of the top trading firms willing to verify this would be newsworthy (if confirmed).
Source. Single. Not plural.
Source is not at one of the top trading firms, but was at one of the top trading firms.
LOL no the top trading firm couldn't give a shit about your favorite Ponzi, not then and likely not now.