After seeing some crazy price movement in all the altcoins in the last week I'd say everything is possible and I wouldn't be surprised if price kept rising above $1500 in May.
Of course, everything is possible, because the price of coins is very unstable. But you need to remember about the risks and be able to get a small profit.
Yesterday all coins was in plus and green, today all reds and prices are dropping, but bitcoin is going up and today we saw new ATH. I'm pleasantly surprised with this price movement, I didn't expect this and probably if price continue to rise steady we can see 1500 dollars very soon, looks like that is just a matter of time now.