Coinbase is bringing staking to the masses in a convenient way via offering users 5% annually for holding Tezos (XTZ) in their wallet. Users must hold Tezos (XTZ) in their wallet for 35-40 days, and after that, staking rewards will accumulate every three days. 

Tezos (XTZ) is the most popular Proof of Stake (PoS) cryptocurrency at this time with a market cap in excess of $750 million. PoS miners earn rewards by synchronizing a full node and then keeping it online 24/7, which is less energy-intensive than Proof of Work (PoW) mining and also has a lower barrier to entry than PoW since no special equipment is required. 

Tezos (XTZ) stakers earn just over 7% annually, meaning Coinbase is taking a fee of just over 2% for its service. However, it can be complicated and confusing to set up a Tezos (XTZ) full node, and it is a long-term hassle to keep the computer running and online 24/7. Therefore, the just over 2% fee that Coinbase is charging is worth it for most users. 

Notably, Coinbase is not the first major cryptocurrency exchange to offer staking services. Binance offers staking for NEO (NEO/GAS), Ontology (ONT/ONG), VeChain (VEN/VTHO), Stellar (XLM), Komodo (KMD), Algorland (ALGO), Qtum (QTUM), and Stratis (STRAT). 

That being said, Binance is no longer available to United States residents, so Coinbase is the only major exchange in the United States that is offering staking services.

Since there are numerous other PoS cryptocurrencies, perhaps Coinbase will add other coins to its staking services if the Tezos (XTZ) staking service becomes widely used. 

Ultimately, this seems to be a new and easy way for United States residents to earn money with crypto.