9. Conclusion

Blockchain technology was born with bitcoin, which today remains the major application and the most remarkable example of its implementation. It has become apparent, however, that alongside the success of this particular blockchain, many variants are possible, some more complex and powerful (Ethereum), some simpler (private blockchains), some avoiding the power consumption of proof-of-work thanks to proof-of-stake, some less speculative (stablecoins). It's a voluminous array of methods and applications that is being born and perfected, inspired in one way or another by Satoshi Nakamoto's unexpected construction. There is no doubt that this new technology will play a decisive role in our networked world, where the tools needed to create secure exchanges of information, value and trust will be key to progress. In the medium term, we will see the emergence of central bank crypto-currencies...