Any possibility this could be partly due to coins stolen in relation to the Heartbleed exploit being cashed out? Even if it's just a single individual who gain

Any possibility this could be partly due to coins stolen in relation to the Heartbleed exploit being cashed out? Even if it's just a single individual who gained access to a large stash, dumping it via the exchanges could be playing a part. Perhaps their motive would be to cash out before anyone catches on and starts trying to trace their transactions/withdrawals.