It's a good thing that more and more altcoin is trying to go beyond bitcoin, because technically they've already exceeded bitcoin.
But the BTC is still the encryption money market leader, it will not be replaced by any tokens, this is the same truth, if have tokens, replaced the BTC, so the encryption will collapse in the currency markets.
Well with bitcoin came the era of cryptos and hence started other crypto currencies, thus bitcoin will always stay the legend of the market in any case and the rate being so volatile it also attracts more investors which other low rate and less volatile cryptos dont and hence I personally think bitcoin wont be affected at any cost with the increase in number of cryptos and neither by the pricings of other cryptos, although as mentioned if some other mean is developed by which the mining time and transaction fees can be lowered then bitcoin might achieve greater heights.