Bisq never had anywhere close to useful liquidity. It's just a small hole in the wall you can take advantage of. Probably best used to slowly DCA.
The problem with becomming a very active whale P2P trader is you'll end up in jail soon for illegal money laundering. At least where I live (🤬EU).
The unplugged (unpluggable) hole I see rn is when you pay someone for work, services or goods.
Also you could buy miners (and solar panels maybe).