I think for the short time it may rise further, but for long term investors it doesn't make sense to invest in it now, just after Bitcoin got Segwit implemented. Segwit will enable 2nd layers over the Bitcoin blockchain.
This means that instant, very cheap payments and anonymity will soon be added to the Bitcoin network, while the security and the network effect is WAY bigger than any other coin.
I think the fast, cheap and anonymous coins will be the first altcoins to be made absolute by Bitcoin. The current rise could be the last pump.