When BTC had hit $1200 - the early adopters from 2009 saw a return on investment of around 450,000. Meaning a $10 investment in 2009 netted them $4.5 million in late 2013. This was possible because BTC was initially fractions of a cent.
It's not a bad assumption to treat alternates like pokemon cards, buy several dozen good ones, and maybe waiting 6 to 10 years and lucking out on one or two of them (if it happens). Maybe you won't make millions but nobody would disagree over a free apartment or a nice car.
Besides alternates do bring a lot of people into Bitcoin. Doge brought in a lot of people into BTC, who were previously not users of Bitcoin, and many of them did not come from the traditional libertarian crowd of which most bitcoiners came from.