I'm waiting for interesting discussions from you
Actualy there are already tokens and coins that a lot more expensive than bitcoin just a few days ago i recieve my primalbase token and the ICO price is 1 primalbase token into 5 bitcoin in short 1 PBT for 5 BTC but the max total of this token is only 1000 total token unlike bitcoin is 21 milion but obcourse bitcoin is the most famous of all cryptocurrency he is the father of all.
What ever the price of the Altcoin ICO may be but when it gets listed it will show the real value and in long term you cannot expect the same price if it got real value then only it will rise if not it will become pump and dump coin. Bitcoin is the only coin which will be survived in long term and no other altcoin will be nearing it.
Altcoin will continue to grow in popularity. Remember that altcoin's success is also visible from road maps and real businesses that they run, so it's not always talking about whales in the trade market. This is called generic growth where the stock is only a long-term dividend.
But also many icos are tied for bitcoin, you can't buy or sell them for other coin or fiat seerency. I think that many alts will rise and grow in popularity too, but l don't think that some alt can come close to bitcoin any time soon. With current acceptance all over the world bitcoin is changing the way how people think about money, governments are discussing about bitcoin, banks are investigating blockchain and bitcoin, all other altcoins need a lot of work to come where bitcoin is now, but for sure they will have easier job cause they are following the road that bitcoin already made.
ETH is first in price after bitcoin, and I'm sure that we will see some other altcoins that will coat a lot and join this race for the first place, just that will start to happen after 2020.