If one wants to bulk unload all of his BTC's for cash, say 500 for example, how can he do that in one fell swoop?
Coinbase has a 50 sell daily limit.
You might also want to check your local laws/bank regulations. For example, I know banks over here are required to investigate, report and/or block sudden transactions of 20.000eur or so due to whitewashing. It guess it's probably best to spread it out a bit over different days, different exchanges and (if possible) different bank accounts. Just to avoid the hassle of explaining perfectly legal, yet large, transactions.