Surpass in terms of exchange value? Yes there was, before. There was such an altcoin that went beyond the btc price before, thats when an altcoin suddenly pumped and It will be immdiately got dumped, only for greedy investors self interest to multiply their risky investment.  But, as of today, btc is way too expensive than any altcoin in the market, and I think there is no way that some altcoin will overtake its price. But, if there is, Im sure it cannot sustain for long time.