Depends on how deterministic you think various things are, but if you can predict the market’s movements sufficiently well then trading on shorter time scales is where it is at and you should be able to print money until such time as you extract enough that the market loses liquidity as people become afraid to trade for anything except the long term (first options, then almost anything at all). Question is when that happens, after which you basically get to collect the spread on every economic trade forever, and quite a big one.
Depends on how deterministic you think various things are, but if you can predict the market’s movements sufficiently well then trading on shorter time scales is where it is at and you should be able to print money until such time as you extract enough that the market loses liquidity as people become afraid to trade for anything except the long term (first options, then almost anything at all). Question is when that happens, after which you basically get to collect the spread on every economic trade forever, and quite a big one.