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There are many my friend! 1. Not many exchanges supporting steem and sbd. 2. Wallets are not available for Steem and sbd in comparison to other cryptos. 3. Steem and sbd are limited to steem platform only. 4. Flaws in reward distribution system which is not generating confidence in buyers mind for invest in this crypto.
Other problem are also there. It doesn't mean that this platform and its cryptos do not have potential to be a great success. Definitely it has but these problems should also be addressed and the potential must be harnessed. I hope after much awaited hardfork20 and smt thing, this platform will go upwards at rapid pace.