Can you hack cash aka paper currency? Of course you can’t, same is the case with Bitcoin protocol. You can’t hack electronic cash but you can rob a bank or an exchange . Similarly you can’t hack the bitcoin algorithm but you can hack the digital banks ( wallets ) and exchanges . The important question to ask here is: Which one is more vulnerable when it comes to security of your wealth: Cash or Bitcoin? The answer is: Bitcoin is surely the most vulnerable currency ever made in history! To rob a bank, you need to put your life in danger, team up with a group of robbers and take up guns and explosives but to rob a Bitcoin wallet, you just need a good laptop! Believe it or not! Just as I was writing, I discovered that on Jan 26, 2018 , one of Japan’s largest Tokyo-based digital currency exchange CoinCheck had been hacked, resulting in the theft of $534 million worth of NEM , and making it the biggest cryptocurrency theft in history far bigger than that of MTGOX where $450 million w