Disclaimer: This is not a financial advise
- Ethereum
So many smart contract build on top of Ethereum and required you to owned Ether to make transactions.
- YOYOW
I personally really like social coin. YOYOW still haven't launch, but it is quite similar to steem, there is witness concept, using graphene blockchain and DPOS.
- Steem / SBD
I am on steem/SBD, so I own steem.
- EOS
EOS combines smart contract concept from Ethereum and Graphene Technology with DPOS from Bitshares and Steem, which make the transactions free and fast.
- Dogecoin / Reddcoin
I bought it when I first went into the field of cryptocurrency. Both coins serve the same purpose of social coin, which is use to make small transactions like tipping.
- IOTA
IOTA technically are not a blockchain because they use a tangle which solves the scalability issue.