Quote from TraderZones:
Declare yourself as unemployed, and your gains as capital gains. You avoid the social security and other self-employment levies an LLC pays.
First of all, that's not true. An LLC is a legal entity, but profits and losses get passed right through, and you pay taxes on them as if there was no LLC. So, capital gains are still your capital gains.
Your suggestion to just say you are unemployed and soldier on ignores the advantages of writing off expenses. Or of writing off a large capital loss. If you are going to trade full time, those are things you do NOT want to just ignore. You won't be able to have those benefits unless you are strctured correctly.
Funding retirement accounts is good advice though.