Instead of spending all the cash to set up a hue ASIC farm and try to get someone of what the greedy big money people mine, I now advocate the idea of STEALING from them. Bitcoin is unregulated and largely unrecognized, so it's not exactly a crime.
You just have to find out the miners, their wallet addresses, and passwords, and you're all set! Get into their wallets, send coins to wallets you control, and sell them for cash! That's it!
Having been a whale a one point, you'd understand that people who invest 100k + know how to keep cold wallets offline leaving only a few hours worth of BTC in their live wallet at any given time. Plus people doing this on large scale will typically cash out several times a day to maintain an average selling price within market fluctuations. Go after the pools, not that I condone that, but the big miners know how to protect their coins. Pools are probably the easiest target.