Why Decentralization Matters in the BTC Network

Hey guys, I’ve been seeing a drop in the number of nodes on the BTC network lately. We all know that full nodes are super important for Bitcoin to function properly. I want to kick off a chat about why these nodes matter and the bigger picture of decentralization in the Bitcoin space. Even though we kinda get that "BTC full nodes are essential for the network," I wonder if we can dig a little deeper. Can we look at this from a math or logic angle to see how decentralization helps keep the BTC network safe and secure? Here are a few things we might wanna think about: 1. How does the number of nodes relate to how secure the network is? 2. What risks come with fewer nodes? 3. Can we measure how decentralization affects resistance to attacks? 4. How does having nodes in different parts of the world affect the network's strength? 5. Are there any game theory models that show why a decentralized setup is so crucial? I think this convo could really benefit both newbies and seasoned pros in the Bitcoin community. It’d help us explain why running full nodes and keeping things decentralized is a big deal. Can’t wait to hear what you all think!

When a Bitcoin miner calculates a Hash number, they need to broadcast their block confirmation to the entire network. Do BTC full nodes act as relayers in this process?

I believe bitnodes software is misbehaving. These website doesn't report sharp decline. https://21.ninja/reachable-nodes/nodes-by-net-type/ https://coin.dance/nodes https://luke.dashjr.org/programs/bitcoin/files/charts/historical.html (this website also include node which doesn't accept incoming connection) Worse fault tolerance, where propagation may be affected if some of those going offline or receive DDoS.

Decentralization of Bitcoin network is contributed by its Bitcoin nodes (full nodes, prune nodes) and Bitcoin miners (with locations of Bitcoin mining farms decentralized in many locations and many countries). To attack the network, attackers must own enough dominant network hashrate but with very high network hashrate nowadays and in future, cost to own enough dominant hashrate to attack network successfully is very expensive. So that risk is small and you can see how small it is with this article and estimating tool. How many Bitcoin confirmations is enough? Tools for attack estimation https://jlopp.github.io/bitcoin-confirmation-risk-calculator/https://web.archive.org/web/20181231045818/https://people.xiph.org/~greg/attack_success.html

What is a Listening node? The chart shows that the number of Listening nodes on the Bitcoin network has dropped from a peak of 23,369 on April 5, 2018, to approximately 4,712 now. What are the risks to the overall security of the Bitcoin network from this? https://luke.dashjr.org/programs/bitcoin/files/charts/historical.html

Usually it refers to Bitcoin node which accept incoming connection. As i stated earlier, it leads to worse fault tolerance. Other than that, some people would argue it leads to centralization.

thanks so much