I think it is foolish to expect such things from Altcoins, because the disappearance or devaluation of Bitcoin means the collapse of the digital currency and may cause the collapse of the Chinese block, but we can expect better and more reasonable expectations than Altcoins. One of these expectations is the development and expansion of the Chinese bloc in other areas such as medicine and agriculture. Atrium, Neo and IAS are moving in this direction, and we may one day see these platforms as global giants. Act in different fields
Well, you asked a question via your title and correctly answered it as well, it is actually Impossible to think that a day will come when altcoins will replace Bitcoin, while it is Bitcoin that controls and Influence the market which is why an attack on Bitcoin leads to the dumping of the market and a good news channelled towards Bitcoin leads to market pump.
Not only that, a lot of investors have trust in Bitcoin because it is reliable and secure for their long term investment thus the reason most of these cooperation and organisations always go for Bitcoin in their emergence to the crypto space. Nevertheless, altcoins will continue to bring their own impacts, innovations and growth of the crypto space in their own way, it is just that, only few altcoins are actually doing this.