If you're holding steem for some reason, then yes, you're losing value and not even getting any interest so it's probably a good time to rethink your approach. However, as I explain in today's video, the lower value of steem at this early point in the game is actually a good thing for those of us that are in it for the long haul.
Trading platforms mentioned in the video:
BlockTrades (fastest & easiest)
Bittrex and Poloniex (better exchange rate but more complicated for newbies)