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Many altcoins are dying just the good ones are just not appreciating as much to show up for it.
Altcoins will never die-it easy money after all as well :P

I suspect a few others are just hedges again Bitcoin ie Decred.
For exp Silver is a more hedge against Gold but Gold is still number 1.

I view Cryptos more like nation states. There no such thing as Bitcoin friendly as there is Bitcoin allied and neutral parties and antagonistic.
For exp:
Litecoin,Monero and Decred are Bitcoin "allied" coins as of right now.
Steem and Eos are more neutral parties.
BCH and Dash are more so antagonistic(to Bitcoin).
And so on ie...