Ethereum sharpens decline to two-week trough

Ethereum declined for yet another session on Friday, marking two-week lows and heading for the first weekly loss in a month on growing concerns over the breach at the Ethereum Classic's network. 

At Bitstamp, Ethereum fell $3, or 2.3% to $126, with an intraday high at $128, and the lowest since December 29 at $121. 

Ethereum slumped 15% yesterday, the third loss in four days, and the heftiest since November 19. 

Market value of cryptocurrencies fell a billion dollars on Friday to a total of $121 billion, a December 28 low. 

Ethereum is down a heavy $21 billion this week, heading for the first weekly loss in a month as selling pressures mounted anew on cryptocurrencies. 

The market was rattled again in whole following yet another noticeable crypto hack.

A security breach at the Ethereum Classic's network with a 51% rate on the currency's blockchain resulted in the robbery of one million dollars so far. 

The breach resurfaced concerns that decentralized blockchain networks are still exposed, especially to newer and less valuable cryptocurrencies.