Why you may want to run a full #Bitcoin  node. 1) You want to support the #Bitcoin  network. 2) You don't want to rely on a 3rd party to validate your transactions. 3) You don't want to disclose transactions in your wallet to 3rd parties. 4) You're interested in strong security and privacy. 5) You're a developer building an application and need API access to the Bitcoin network. Wallet, mining pools, exchanges. There are only 18,644 full nodes online around the world.