Alternate cryptos all have their day in the sun when they launch but ultimately in the long term none of them have the staying power of BTC. Crypto prices are highly correlated in the short term but over time altcoin value decays compared to a BTC benchmark.
This is a long-term divergence play, shorting a basket of well established altcoints and hedging against short-term volatility by going long on an equal value of BTC.