Short answer, we don't have any way to know that it won't be one of the losers. More nuanced answer (suggestion), weigh what fundamentals you can gather, compare and contrast what Steem has to its competitors and determine for yourself whether it deserves to be in its current position. Invest or speculate accordingly.

I've always been a diversify your portfolio type of dude (you could even say a conservative speculative investor), so this under-performance of Steem hasn't really been of much concern to me, especially since I've been heavily hedging my position in EOS, which has been performing relatively well.