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Act with great care, coins with small market caps and thin volume (fits the bill for sbd) have been pumped and dumped in the past and will continue to do so as long as exchanges and regulators allow the manipulation of the market. Buyers of SBD recently are looking for a quick return, they're weak hands and will sell for a profit. It's easier to move an object when it weighs less, which is why they'd have to try harder to get the same price action on something with steem's market cap.