I don't think that there will be competitors for bitcoin in price. Even there will be better altcoins compared to it. Like ethereum or some other altcoin. The popularity of bitcoin is immense and is growing everyday. No one other altcoin has such popularity. Anyhow never say never. So exist an 1% of probability that some other altcoin goes higher than bitcoin. But for me this 1% don't exist or better is only theorique.