The whole point of the ASIC, as I understand it, is that it's custom built for mining to provide insane speeds. If you build something like that, wouldn't it be more profitable to simply mine yourself? You could argue that you need to recover capital costs for your investment, but mining would accomplish this AND not create a bunch of competition for the tech you invented.
It seems to me that if you build a custom ASIC miner, you mine for a while with the hardware while you are developing even better tech, then sell off the stuff you have been using as "new" to the general public. You can almost even see this happening as all the ASIC's have a long wait time.
It seems to me like ASIC mining isn't going to be a highly profitable game unless you're the one developing the tech yourself. What am I missing?