First of all, this is not investment advice, just an analysis.
I obviously didn't follow XEM a lot, but if we look at the chart, there is a high volume drop. The 0.3200 level is a very strong resistance level. He can make a comeback from here and repeat his old ascension. Maybe it can even do ATH in the Long-term form. But since we are in a falling trend, we have to put a 'Stop-loss'. Maybe we can buy from low again after the stop loss occurs. But I think it offers us high profits right now...
Finally, all your transactions belong to your decision and strategy. I wish you a good day!