MetaMask Extension is an extension for accessing Ethereum enabled distributed applications, or "Dapps" in your browser! The extension injects the Ethereum web3 API into every website's javascript context, so that dapps can read from the blockchain.

The Metamask enables the users to manage and safely store the transactions, account keys, cryptocurrencies along with the tokens. With the help of a MetaMask Sign In account, you can easily use the Metamask account to connect with decentralized apps or Dapps along with a compatible web browser.

Coinbase Sign In building the cryptoeconomy – a more fair, accessible, efficient, and transparent financial system enabled by crypto. Coinbase started with the radical idea that anyone, anywhere, should be able to easily and securely send and receive Bitcoin. Offer a trusted and easy-to-use platform for accessing the broader cryptoeconomy.

If you want to start earning passively in cryptocurrency, I advise you to familiarize yourself with the concept of staking, from this best crypto to stake article in which you will find answers to all sorts of questions related to this passive type of earnings in the crypto industry