Nope.
https://www.cryptoninjas.net/2017/06/08/cumberland-mining-offers-convert-bitcoin-held-mt-gox-cash/
This OTC broker offered a deal to buy all 202,000 coins in one deal.
No one with a significant amount of BTC should sell it on an exchange. There are extremely deep pockets off market.
The article is not opening for me, but, wow, that's a big deal indeed. And I agree that depositing such a big amount on an exchange is a crazy thing to do. Don't tempt the exchange owners, guys. If you want to exchange big amount do it a part at a time, no need to do it in one deal. One can object that that the rate might become worse with time, but since it's unpredictable it can become better in the same way.