I just watched a very interesting webinar on Proof of Work, blockchain architecture, and Nexa. What stood out to me most is how often the discussion around Proof of Work gets reduced to one topic: energy consumption. But the bigger question is much more interesting: What properties do we actually want from a decentralized network, and how do we make those properties sustainable in the long term? A few key takeaways from the presentation: 🔹 Proof of Work is about more than mining. It allows participants to compete without relying on a central authority. The real-world cost of computation makes attacking and rewriting the network extremely expensive. 🔹 Proof of Work and Proof of Stake have fundamentally different properties. Proof of Stake is far more energy efficient, but PoW has an interesting advantage when it comes to initial distribution: participation is based on computational work rather than already owning a large amount of the asset. 🔹 Then there is the Blockchain Trilemma: How do you achieve security, decentralization, and scalability at the same time? Bitcoin has prioritized security and decentralization, but this comes with limited Layer 1 scalability. As a result, many scaling solutions move activity to Layer 2. 🔹 Nexa takes a different approach. The goal is to make high transaction throughput and low fees properties of the Layer 1 itself, rather than relying primarily on additional layers. 🔹 One of the most interesting concepts was “indirectly useful Proof of Work.” Instead of trying to make the actual PoW computation useful for something like scientific research, Nexa is looking at how the hardware used for mining can also create value elsewhere in the ecosystem. Nexa’s PoW incorporates Schnorr signature verification. Hardware optimized for this process during mining could potentially also be used to make signature verification faster for full nodes. So the idea becomes: Mining → better hardware → faster/cheaper nodes → stronger decentralization. 🔹 Nexa POW v2 is another interesting development. By introducing a cellular automaton into the mining algorithm, the goal is to make it much harder for ASICs to dominate the network. That could help keep mining more competitive and accessible while encouraging the development of FPGA-based hardware. 🔹 And finally, there is the economic side. Block rewards decrease through halvings. Over time, transaction fees will therefore become increasingly important for miners and for maintaining the security of the network. This means scalability isn’t just a technical issue. It is also an economic issue. If a blockchain wants to remain secure and decentralized over the long term, it needs enough real-world usage and transaction activity to generate the fees required to support its infrastructure. So perhaps the better question isn’t simply: “Which blockchain has the highest TPS?” The more important question is: “Which blockchain can combine security, decentralization, scalability, and a sustainable economic model over the long term?” That is the challenge Nexa is trying to address with its architecture. Complete video below 👇 👀 #Nexa #ProofOfWork #Bitcoin #Blockchain #Crypto