The whale alert Twitter account is monitoring a wallet with 80,000 BTC that is not active since 2011 that if decides to sell can hurt the crypto market seriously accordingly to the analysts. The wallet is inactive all those year's and represent 0.44% of all total bitcoins in circulation.

The analysts are monitoring the wallet and noted that small Transactions are occuring only in,no selling was Registered since 2011 maybe the owner just died or it's a big Hodler that can "kill" the market if decide to sell those BTC.

Only that wallet is securing more than US $750 Million and let's imagine if He decided "now is the time to sell " ... The market could fall down heavily and not long ago someone decided to sell an enormous quantity of BTC and that reflected on the price that dropped 15%. 

More developments will be followed at the whale alert at Twitter and for that long the wallet being inactive could also mean the owner could be dead or lost the private keys but that is just speculation... only monitoring it to see what happens next!