BTC is king and always will be. whilst its good to have alternative crypto currency and diversify if you are purely into it for investment but i currently use BTC monthly and think that advise is pure speculation. The places i spend BTC very few accept alternatives.
Banks and corporation are only looking at the blockchain solution, i don't think they will ever adopt the currency.
All the recent noise about crash, trade bottlenecks, Chinese regulations etc... 2 months ago have been blown out the water by the price and continued adoption.
So little is known as it is so young, anything even what 'experts' say is 99% guess work. I'll stick with what i've got, but good look.