Some people think it is morally wrong for the Ethereum Classic or ETC to be pumped. So it might be dumped eventually.

If you think of bitcoin like a new invention (which in a sense it is) you may be able to shed a different light on this question. As with all new things people will try to improve upon or recreate the idea with better features. Bitcoin is exactly the same hence the creation of altcoins. Most founders are either trying to recreate bitcoin but with some better different features, or are looking to make a bit of extra money into their pockets. Still I believe, as with all business's, there will be a competitor(altcoin) with bitcoin that will have a similar market price with some features that bitcoin doesn't offer.

if bitcoin was today placed without altcoins so it can effect a lot to its value.altcoins brings to what bitcoin market needs it bring compition and also many advantage. people can choose otger cryptocurrency and can trade with them and the price ups and downs are now profit or loss its the good use of a technology

If bitcoin without altcoin happened, all people will focus at bitcoin and it also affect the price of bitcoin for sure, because many people not using other altcoin beside the bitcoin itself.

As bitcoin's value grew, profit has probably also become a motivator for some currency developers. Alternative cryptocurrencies thrive only in bitcoin's shadow. Each new cryptocurrency that comes forward benefits from the groundwork of bitcoin.

The bitcoin developers are working very hard. The bitcoin Core Client will integrate the SegWit and Block size increase soon.

i think altcoins have made the whole crypto scene alot more interesting and there has been some really good innovations.  Bitcoin definitely has value with or with out the alts as it is mostly priced in fiat.  were as alts are more likly to have no value without bitcoin.

i don't agree with this at all.
altcoin has never had any effect on the bitcoin price.
a while back there was some FUD being spread all over the internet about bitcoin by Ethereum supporters that lead to bitcoin price fall back down to $390 before the big rise but that is all the effects altcoins has ever had on bitcoin.

bitcoin without altcoin less attractive, and not good for the development community, examples in bitcointalk who hold regular signature campaign continuously is new altcoin launch
you imagine going to a lot bitcoin exchangers of death if only  are outstanding
there may be little huobi okcoin and market placed exchanger local

bitcoin without altcoins is just like dollar without poundsterling, euro, or anything else.
to trade a commodity, we need an alternate to compare the quality (price) when it flooring on the market.