The aim of the work is to illustrate the analysis of mining feasibility. In the first chapter, some preliminary concepts sush as symmetric cryptography, public-key cryptography, hash functions are recalled, with particular attention to SHA and Keccak-256. The theory of Elliptic Curve Cryptosistems is mentioned, and in particular Secp256k1 is analyzed. After introducing the Blockchain, the protocols of Proof of Work and Proof of Stake are examined. The second chapter is focused on Bitcoin. Concepts such as block structure, Merkle tree, Merkel root, Difficulty, Hashrate, Bitcoin transactions and block speed validation have been deepened. In addition, several processes like verification of transactions, block validation, Fork and finally the process of creating Bitcoins have been investigated.