Yes, it is time to buy, I do not think that it will go down again like the last time. It is pretty good that there was a strong decrease, because we can figure out the time of growth more easily.
If we talk about the fact that in this month the market began to recover after a long dump. But it seems to me that it is unlikely that by the end of May the price has risen so much.
It is a good coin with high potential. Yes, it is low, but as you have said, one does not exclude the other, so it might rise and we can get profit from that increased percentage.
There are a lot of coins that fail, because almost all of the cryptocurrencies went down from a long while. If Bitcoin goes down, so the others will. There are coins that have bright and good future even now, yet they could not be seen right now, the reason for it is the market condition.
The reason is that Bitcoin is the main cryptocurrency, where the others called "alternative"= alike coins. The affects that play Bitcoin, play on other alike coins as well.