To support your argument, according to this[0] the largest recent transaction about 3 hours ago was almost 25 million USD. 5 other transactions also exceeded 1 million USD in the last hour or so.
I could be wrong, but I read somewhere that almost all of those large transactions are inter or intra exchange movements simply moving money around into different wallets. Also, they only indicate a transfer, it seems very unlikely that anyone has cashed out $25m all at once with bitcoin.