What can we do to contribute to the blockchain?

[SquirrelJulietGarden]

To contribute to the blockchain is you can run your own node. If you wanted to donate then I suggest you donated to the developers who are trying to make bitcoin better. Holding your own bitcoin in my opinion should also be contributing to the blockchain since you are making a transaction and it should be recorded in the blockchain when it is confirmed. Using it in your business is also helpful for bitcoin since it is what satoshi made it for.

If possible, running a Bitcoin full node but it requires big storage space so if you can not afford enough disk space and other technical parameters for a Bitcoin full node operation, you can run a Bitcoin prune node.

Running a Bitcoin prune node and using it for your Bitcoin storage and transaction broadcast is still better practice than relying on nodes run by the others with SPV wallets such as Electrum wallet.

The Bitcoin Network with more information about Node Types and Roles on Bitcoin blockchain.

[Bear2Bull]

To contribute to the blockchain is you can run your own node. If you wanted to donate then I suggest you donated to the developers who are trying to make bitcoin better. Holding your own bitcoin in my opinion should also be contributing to the blockchain since you are making a transaction and it should be recorded in the blockchain when it is confirmed. Using it in your business is also helpful for bitcoin since it is what satoshi made it for.

To support the Bitcoin blockchain, operating your own node is a proactive step that strengthens the network's infrastructure. Another impactful alternative is donating to the core developers dedicated to perfecting Bitcoin, driving innovation and maintenance. However, contributing doesn't stop there. Holding your own Bitcoin also represents support, as every transaction you make validates and expands the blockchain record. Furthermore, using Bitcoin in your business context aligns with Satoshi's goals, facilitating its use as a functional currency. All of these actions collectively increase Bitcoin's decentralization, security, and practical adoption, solidifying its position as a sustainable monetary system.

[nakamura12]

If possible, running a Bitcoin full node but it requires big storage space so if you can not afford enough disk space and other technical parameters for a Bitcoin full node operation, you can run a Bitcoin prune node.

Running a Bitcoin prune node and using it for your Bitcoin storage and transaction broadcast is still better practice than relying on nodes run by the others with SPV wallets such as Electrum wallet.

The Bitcoin Network with more information about Node Types and Roles on Bitcoin blockchain.

It doesn't have to be full node if a person doesn't have the fund to be spent for running a full node since it takes a lot of disk space for all the data in the blockchain. I didn't mention it but I am sure many people are aware of running a node needs a lot of disk space for full node and also aware that there's also a prune node which doesn't keep all the historical data after verification unlike the full node. For those planning to run a node but doesn't have the budget then I recommend running a bitcoin prune node.