I think Bitcoin is made and worthless, people realize its potential and make it worthwhile. Altcoin created because their developers want to cut corners and earn fast money.
while Altcoin is not made as an increase in bitcoin or to innovate crypocurrency. Most of them are merely pumping and disposal schemes superimposed to look like 'next big thing'.
News altcoin may be more advanced in the technical field - for now, because bitcoin can be improved. But then it never beats one and the most important attribute of BTC - near the perfect initial distribution.