A Freshman 51% Attack

Police in the Indian city of Bangalore have seized an ATM just weeks after it was set up by local cryptocurrency exchange Unocoin.
A college freshman is coming after your cryptocurrency – but not to steal your coins, just to prove that someone could do so pretty easily.
The Financial Services Agency, also known as the FSA, Japan's finance regulator, has formally approved a cryptocurrency exchange association as a self-regulating industry body.
Over a million dollars' worth of bitcoin has been hidden in a digital picture – and there's still some left to be found, despite attention from cyber-sleuths.
The U.K.-based settlement infrastructure provider Setl has been granted a license from France's securities regulator to operate a central securities depository system using blockchain tech.