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Making $100,000 USD per month, no idea what to do with it 
You already did the leg work by putting your money in a Schwab account. They have some of the lowest fees on index funds you can buy. I would keep things dead simple. Decide if you want some of it to be an IRA or not, and then plow your funds into a broad stock only index fund such as SCHB, SCHX, or SCHV (you could buy all three, but there would be no need to whatsoever). You will get around 2-2.5 % dividend yield, be diversified, and have extreme low fees. Fees are key to getting good returns in funds. Of course..set tax money aside as well.