I think what the article actually tries to say is that if you invest in BTC NOW, you will not make that much.
While other cryptos will now see same growth as BTC has made over the past few years.
To some extent this is true also. There are Alt coins that have given 1000x returns in just few months from their inception.
Anyway, we have seen all the odds against BTC yet it has flourished. No Yahoo and Google can change this.