"The Blockchain Tower" is the first part of my Cryptonia series. Cryptonia is the first city in the world based on a blockchain ecosystem. The Blockchain Tower is one of the main structures of Cryptonia. It’s a huge calculator providing massive computing power to the users thanks to its digital roots, that are flexible semi-organic elements able to expand underground for miles. The sentinels are aerial antivirus that guarantee strong protection to the tower. The Blockchain Tower is meant to supply the enormous computational power to the people in a overpopulated city where the only currency used is the cryptocurrency. So everyone needs high performance machines to take complete advantage of the blockchain technology and cryptocurrency mining. The tower help in this, but the user still takes advantage of a decentralized, indipendently regulated, autonomous financial system.