It's still too early to make such a conclusion. The rise of Alt-Coins might have stalled at least for now but the upward trend is not yet over. Sure bitcoin is a more stable and popular investment option but some alt-coins have got great potential.
That's why I say that cryptocurrencies have future. Only the shit coins will be dumped to the ground but the powerful altcoins will hold it's ground even after the correction. People understood the value of altcoins and I don't think there will be a time where people take out all of their money from them.