My understanding is that yes if they just hold the metadata about the fact that you own equities or treasuries or etc, then they cannot use that as leverage tha

My understanding is that yes if they just hold the metadata about the fact that you own equities or treasuries or etc, then they cannot use that as leverage that puts those assets at risk. They make money on the transactions that lead to cash and or fees and or gravity associated with you being there. But I'd love to hear this double checked by someone with more expertise: mine is anecdotal