I disagree that bitcoin is useless. Many people use bitcoin as a storage of money, some uses it as a currency and also for other transactions.
As an answer to your question, I think it is possible that an altcoin can lead the market someday, however, it will only be possible if bitcoin crashes and lose its popularity which is I think will took to long to happen. Bitcoin is just getting started to attract investors, from last year's price until now that many advertisements