Let's also consider that altcoins are just another big opportunity, in the same case that bitcoin started with zero value, now altcoins also have the opportunity to expand, and now altcoins have even more chances to thrive because bitcoin already made the road for them, time will tell which one is the one to stay according to their features.
If Bitcoin went from zero to thousands of USD per coin, it doesn't mean that current alts costing zero now can do the same or even something similar. This notion, "Buy XXXcoin while it's cheap!", is exploited too much by creators of new alts, but the truth is that most of them will never go above the initial price, and also can quickly go down after a short-lived pump.