The evolution of blockchains

First, it is important to underline that there are several generations of blockchain on the market. The Bitcoin blockchain is considered the first generation, a very secure and decentralized infrastructure, which is why more and more miners are joining the network, but with low performance in terms of processing transactions and weak upgradability; in other words, users cannot do much more with Bitcoin's blockchain than send Bitcoin. Ethereum is considered the second generation of blockchain because it implemented major improvements to the initial protocol such as smart contracts. The third and fourth generations of blockchain are mostly focused on increasing the number of transactions per second, as well as providing enterprises with a flexible and suitable infrastructure for their needs. Aergo, Quorum, and Hyperledger can be cited as examples...