Cosmos can interoperate with multiple other applications and cryptocurrencies, something other blockchains can’t do well. By creating a new zone, you can plug any blockchain system into the Cosmos hub and pass tokens back and forth between those zones, without the need for an intermediary. Scaling is another open issue for blockchains. Both Ethereum and Bitcoin support only a fraction of the transactions seen daily on payment networks like Visa or Mastercard. In contrast, zones allow Cosmos to scale out indefinitely. Another problem blockchains run into is how to handle upgrades when new versions come out. Getting all of the validators ('miners' in the case of Bitcoin) to upgrade to a new version of a blockchain simultaneously is tricky, and could lead to hard forks. Cosmos offers a way to link them together, but without creating a new centralized clearinghouse or exchange.