Well yes there is a significant of price in bitcoin if whoever owns that address will sold all of his bitcoins but on the other hand, i high doubt that one person owns that huge amount of bitcoins in that address (i only know person who owns a huge amount of bitcoins 40k to be exact and that is roger ver) and if that person owns that amount of bitcoin and cashes out, the problem is the banks and the government depending on what country he /she lives they will investigate you regarding with your money received on your bank account from the exchange or worst he/she will be charged with money laundering. If you ask me, who owns that address? I 'd that address owned by an exchange.