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Buying cryptocurrency are not like day trading, you should buy cryptocurrency that you believe in future (since the market price are so volatile). > 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.