I know you can (somehow) get coinbase to increase limits, but why can you only withdraw (to bank) $10,000/week? Assuming we all become millionaires

when we want to cash out a million dollars worth of BTC, it'll take 2 years to get it transferred to your bank. Aside from localbitcoins, what options are there to cash out faster than that? Or am I n00bing out here? Am I missing something? I still haven't found a good fiat to bitcoin to fiat option other than Coinbase.
You can get the limit increased by following their instructions. It works, and didnt take much time. They could be busier now though.