I don't think there is any other crypto currency which is undervalued other than Bitcoin. Yes! All other cryptos look very bad infront of Bitcoin. Looks like most of the cryptos will die one day or the other. It is even riskier to invest on these cryptos for long term.
In the long run I will personally choose to invest in bitcoin compared to other coins. Because according to me personally bitcoin will be able to generate profits even though it requires a little longer time but when compared to other coins I would prefer to stay on bitcoin.