Well he has been dumping it since December that's why the price goes down from the December high. And he will continue to dump as it was reported he still have like 1.7B to dump. If he we dump it in the next couple of months they bitcoin will be go down and another good buying point.
Its turning ugly but what can we do? Nobody can talk this guy out from completely dumping and putting pressure on the already volatile market.
He doesn't have $1.7 bn to dump!
MtGox went bankrupt in August 2014, when the price was $487 per bitcoin, which meant the total liabilities were about $400 million.
The trustee has sold just enough to meet all those liabilities. The rest of the coins belong to Karpeles who won't dump them.