In other words, every penny you invest now turns into at least $200 at that point (even if your altcoin is only worth 1 satoshi/coin). Seems like they are worthless right now compared to what they could be.
The idea is that if you believe altcoins will be world money, why wouldn't you save up as much as you can?
They are not really worthless, actually it is a good opportunity to buy them now since they are cheaper compared on how much they cost before. Saving some good crypto now can be a good investment in the long-run. The market will not be on a bearish movement forever.