Today I want to share a pretty solid way to make money in crypto that few people pay attention to — running blockchain nodes. I’ve researched thoroughly what a node is and how to deploy it, and I see this as a truly sustainable path if you have patience.

Simply put, a node is a device (a computer or server) that helps the blockchain network operate. Each node stores data, verifies transactions, and communicates information to other nodes. They are the backbone of the decentralized system — without nodes, blockchain cannot exist.

The operation is quite straightforward. A node receives transaction requests from users, sends them to validators or miners, and then updates its ledger once the transaction is confirmed. This entire process keeps the network synchronized and secure.

There are many types of nodes. Full nodes store the entire blockchain history — this is the best choice if you want to run a validator. Light nodes only store block headers, suitable for lightweight applications. Lightning nodes operate on Bitcoin’s Layer 2, reducing fees and increasing speed. Supernodes are special nodes with roles in monitoring the network.

But the most interesting part is: how do you make money from running a node? First, many projects have airdropped huge rewards to early node operators. Celestia once gave around $3,000 USD, Ironfish distributed over $1,000 USD for testnet participants. These are retroactive rewards — projects recognize your contribution after the fact.

Second, you can become a validator on chains like Ethereum, Cosmos, Avalanche to earn staking rewards. However, this method requires significant capital or delegation from others.

Third, many testnets are open for registration, such as Zircuit, Seda, 0G — projects without tokens yet but with high airdrop potential. Running a testnet node costs nothing but can bring substantial profits later.

Fourth, if you have a powerful machine, you can act as an RPC node provider. dApps needing fast data will pay you fees or grant you rewards.

What does it actually take to start running a node? The first step is to rent a suitable VPS. Popular providers include Contabo, Hetzner, AWS, DigitalOcean. You need to carefully check the hardware requirements for each project — L1 chains like Aptos, Sui often require RAM >=16GB.

Next, install the node. Visit the project's Github, get the script and detailed instructions. Most nodes run on Ubuntu 20.04 or 22.04. After installation, you need to monitor the status continuously and update configurations as required by the project — for example, Farcaster increased its RAM requirement from 8GB to 16GB(.

A very important point is to record your wallet address, node ID, and logs clearly. When the project launches an airdrop or retroactive reward, you’ll need proof to claim.

In reality, running a node is one of the least competitive ways to earn money in crypto if you have basic technical knowledge. No large capital needed — just a computer, a stable internet connection, and patience. If you’re new, start with free testnet nodes to understand the process. Once comfortable, expand to validators or specialized systems.

I also want to remind you that this is not investment advice, just sharing experience. You should do your own thorough research before deploying any node operation.