In my opinion, YES.
It's true that their taxes are high compared with other platforms when you buy/convert/sell cryptos, but their safety is top and Coibase Earn is a great way to learn about cryptocurrencies and to win some of them.

As you can see in the photo, you just have to follow these steps, easy.
First of all you have to be in the waitlist of every crypto and you'll be notified when you can win them. Every time you do these steps you'll earn between 6 to 10$. 
With some crypto you have the chance to invite people (4 maximum) to join Coinbase Earn and do this steps, giving 10$/person if they do it right.

For me it's a bargain, and a fantastic way to learn about different cryptos and earning them! Join me!
https://coinbase.com/earn/xlm/invite/qp18z2xn -- XLM
https://coinbase.com/earn/eos/invite/vrsc631p -- EOS
If you don't have an account in Coinbase --> Use this link: https://www.coinbase.com/join/lozano_0c3