If you are asking only from the list above then Polkadot. If you are looking for other coins to invest then I would without a doubt say HIVE . Go to https://hive.io/ and join now .

Do you know that how many ways are there to earn HIVE?

- Post and earn
- Upvote others and earn
- Invest and earn
- There are lots of second layer tokens like SPORTS which concentrate on sports related content which you can buy directly from HIVE and make profit .
- There are lots of games built on HIVE ecosystem to play and earn .


I currently am earning a good passive income from HIVE and what I love is the community .