I learned from an email sent to me from Blockchain.com that it is possible to earn 4.5% on the bitcoins deposited on my wallet.
"Our custodial Interest Account allows you to earn interest on the funds you keep in your wallet. All you need to do is deposit bitcoin from your non-custodial wallet into your Interest Account and leave it there, and we’ll do the rest!"
How it works
"Interest is calculated and compounded daily, and paid out monthly (on the 1st of each month). All amounts are denominated in BTC, including deposits, withdrawals, and interest calculations and payments.
When you make a deposit into your Interest Account, you will be shown the interest rate for it. This is an annual yield rate: it’s the amount of interest you would earn if you kept your funds in the Interest Account for one year. Let’s say you deposit 1 BTC into your Interest Account with an interest rate of 5%*. You would receive interest payments monthly, and at the end of the year, assuming no further deposits or withdrawals and no changes to the rate, you would have 1.05 BTC in your Interest Account.
Keep in mind that, due to market conditions, the interest rate may go up or down while your funds are in the account. We will inform you of the change via email and you can always check the current interest rate for your account in the account details as well (accessible in the Earn Interest tab of your wallet) and withdraw or deposit more at any time.
*Our current interest rate is 4.5% APY. This may be subject to change."
Source of news
https://support.blockchain.com/hc/en-us/categories/360003244552-Interest-Account
https://medium.com/blockchain/interest-account-dff0c814d666
