People like to put up bidwalls and let them sit for weeks with no hurry to buy or sell coins. And if the wall stays for a month, they're fine.
If they're buying the coins to use, they would just buy them. If they're buying them to invest, then this bidwall would drive the price the other way and the only way it would be reached is if the currency is rising or selling a lot to make their buy or sell a money loser.
So it would seem they do this to manipulate the market and keep it high or low.
Anyone know for sure??