Comment by diyang

You can get money in and out of the Stellar network using gateways. You can learn more about them here: https://www.stellar.org/learn/explainers/#Gateways_trust_and...

This post is about keeping everybody's copy of the ledger the same using a process called consensus. Even if there were no gateways, there still is the problem of ledger agreement, so we'd still need consensus. Gateways and consensus are orthogonal. You can learn more about consensus here: https://www.stellar.org/learn/explainers/#Consensus