If you are just start looking into Bitcoin that's for you.
Coinbase is the most famous and simple way to buy, sell and store criptocurrency.
Registering with this link you will get 10$ when you first buy 100$ of any criptocurrency: Coinbase
But you can actually start earning without deposit money thanks to the Coinbase Earn project.
You just have to watch some short (2min) educational video about altcoins and answer easy question.
50$ Stellar Lumens: https://coinbase.com/earn/xml
50$ EOS: https://coinbase.com/earn/eos
52$ ORCHID: https://coinbase.com/earn/oxt
