For sure those Bitcoin are not forced to sell immediately with the market price once become available.
Even those Bitcoin will be sold to the market, who cares? There are still a lot of people buying Bitcoins these days. There are still buyers.
This could be a FUD also that they are spreading.
Again Mt.Gox is used to fud and causes panic sell on the market.
It is not real reason of this fall because Bitcoin has rallied from $17k to $25k and it must be pulled back. I believe that Bitcoin after this pull back will climb gradually to $27k or $28k and we will get another fall that can be bigger than this one.
Mt.Gox is a very old story and with high trading volume of Bitcoin market nowadays, it does not cause big effect than in the past. Don't panic but I know people will still be panic.