Yes, in my opinion also there will not be any specific usage of most of the altcoins.
Dash claims they are anonymous. But with the bitcoin mixer I can make my transactions more anonymous and non-traceable. So there will not be any significant use from most of the alt coins.

I see a lot of answers bitcoin can live with itself.

I dont really know much about that because I am still not knowledgeable regarding altcoins. But I know that it all started with bitcoin.

Yes i agree with that bitcoin is the first coin created and thats why it is very trend and famous among other alt coin but really altCoin for today is very important to traders because they making money with it trading alt coins like forex is profitable and there are some coin like eth competing because the value is rising to. Its very good for bitcoin to have healthy competation by that it can add color to bitcoins and can add uniqueness.

All started from bitcoin and some time later the new coins appear after bitcoin namely litecoiin but before another coin came bitcoin was able to survive, its PROVE

Altcoins somehow give a positive effect to bitcoin. It is hard for them to achieve what bitcoin has because bitcoin is already an established crypto before them. They are just wishing right now for bitcoin to fall and rise up to take the place.

I think bitcoin can't live without altcoin cause mining bitcoins is not proftiable right now, much better to mine altcoins and trading it into bitcoins. Many people working this way, i think it's right.

of course all Startlingly on bitcoin. bitcoin is the originator or cryptocurrency first created and with bitcoin phenomenon that began to be popular then lots of smart people who wants to follow bitcoin and create a new cryptocurrency. but bitcoin first born and famous. bitcoin will survive even stand alone as when you first start

Agree. New technologies might provide innovation, but it took a while for the trust in btc as an actual currency to build. It was hard fought actually, and outside of this community, I see no widespread adoption of any of the alts. That will change, but in time.

Unfortunately, you're right.
However, altcoinsare an important part of the  cryptocurrency market. Decentralization is one of the most important goals of Bitcoin, but altcoins improve further the process of decentralization cryptocurrency community. In addition altcoins help developers to experiment with unique characteristics.
Altcoins offer a healthy competition in the market cryptocurrency and thereby provoke Bitcoin developers remain active and continue to develop innovations. If part of the crypto community considers that the Bitcoin is outdated and no longer meets their needs, they can take altcoins.