I don't think any altcoin will ever beat the price of bitcoin, bitcoin is the main coin in this market and of course it will always dominate the cryptoqurrency market. so I don't think any altcoin will ever beat the price of bitcoin itself.
It will make the holders that's keeping more with altcoins than bitcoin to feel bad. They will hardly accept that there will be no altcoin that can replace bitcoin. It's been a very long discussion since they've been seeing a lot of altcoins getting into the market. I'm with few altcoins but never thought of this ambitious goal that one of my altcoin will ever overtake bitcoin. That's such an ambitious thing to think of, sadly, there are still developers and endorsers who keep on thinking of this.