... could have already sold his shares (if he wanted to) for (0.00468334/0.0032)*1000 = 1,463.54375 BTC. This all comes to a 56% return on investment, or 560.884485598 BTC in cold, hard liquid profit....
How does one sell 1463btc worth of share at 0.0046 when buy depth has only 156 000 shares going as low as 0.0018 ,,, for a possible sell of ~550btc ?
You don't seem to understand how these markets work. One could place an order of 1463btc worth of shares at 0.0046 and then when the order is filled they have 1463btc. The stuff on the order book is just what you could get if you sell right now, it does not stop you from placing your own order higher on the order book.