Shouldn't be an escrow need to have enough money of his own before performing an escrow in a marketplace?
Probably.
Obviously an escrow should be wealthy enough to not ever be tempted to compromise his position of trust by abusing it & stealing funds. An escrow here should be an uber trustworthy, somewhat wealthy user.
I would volunteer myself to hold funds & provide escrow but I can’t be bothered with the extra work to be honest.