Blockchain is one of the most secure and open-access methods of data storage ever invented, and this method is considered to be impossible to ever change, even to hack.

 This technology is revolutionizing secure transactions, or speedy transactions.
  Blockchain is being used worldwide for cryptocurrency or Bitcoin transactions.  Where blocks contain the digital data of all transactions.  Because it is flawlessly secure, blockchain has become very popular for real time settlement, fast payments, clearance without 3rd parties and asset buying and selling.  Blockchain Olympiad was held for the third time almost a year ago.