I've found online this amazing way to earn interest on Bitcoin! It's a service opened since 2013 who has over 11 million registered users and provide a Savings Wallet that let you earn 4.08% annual interest divided into daily interest! I've used the service for a while and now I've written a complete article about it, check it out here:
https://protonbitcoin.com/earn-interest-on-bitcoin-low-risk/
I like freebitco.in, the owner of the site has always been a standup guy. The only thing I don't understand, and the thing that makes me cautious about anyone offering to pay "interest" on btc holdings, is that in order to pay interest on btc holdings, the payer of the interest has to be making more than the interest he is paying with your btc holdings. Otherwise, paying someone interest costs that person money. Four percent is a pretty generous rate on a USD basis for interest, so that leads to the question: What is Wetsuit doing with the bitcoin holdings that is generating income that allows him to pay 4% interest to the website users. I don't know the answer to this, and that along keeps me from putting any outside funds on his site. I'm fine keeping whatever I had generated there on the site, it's not a significant amount and it was "free money" anyway.
But as a starting point with investing, always understand how the investment generates value, otherwise it's not safe for you to put money into it.
They also show us the mining proof. It's a serious site! A great way to earn interest in bitcoin