Not impossible but unlikely. Maybe only in case that some major flaw is found in bitcoin which is not present in future x coin and therefore people migrate to it to protext their investments. What will i do? No idea at the moment tbh.

Bitcoin is altcoin Dad so that it is hard to find real surpasses specially in it Value .

Answer No one can close on is ETH

Not now, see btc value now its way too high that will be hard to surpass by any alts, maybe some ICO who will eeleasw token with that huge amount alrwady can do that.

I prefer to the more "valuable" coin. If altcoin surpasses the value of BTC i will preferring to leave a worthless bitcoin because the "valuable" coin is more benefit we can get from trading it.

If this things happen that altcoins will surpass bitcoin its value,will my sympathy is still in bitcoin because whatever happens all altcoins when you exchange or trade it and turn to fiat currency it  will pass through back in bitcoin,we cannot exchange etherium or any other altcoins into fiat, we must trade it into bitcoin beford become fiat money.

It will be just fine for me if ever that thing you have stated really happen that alternate cryptocurrencies or altcoins will surpass bitcoin. Actually it will be just fine if the altcoins will excel their prices so that we can be able to have lots of big holdings from the campaigns or investments we have that includes altcoin usage. I will still hold into my bitcoin whenever that thing happen because I still do believe of bitcoin's capability to make its price rate grow much larger together with the other coins so that we can have a good and comfortable life.

The price of bitcoin is still very high. But it still possible that altcoins can surpass the price of bitcoin. The price of bitcoin is still fluctuating and this is a sign that it is alive and a lot of users still demand for it. Altcoins today are still being horde because the prices of these altcoins are also fluctuating. One good altcoin is Ethereum, yes the price is still fluctuating due to its demand but i still think bitcoin will also have a higher value if the price is still rising. I would like to invest in those altcoins if they surpass bitcoin.

Possible but not likely. Alt coins that have copied bitcoin have all failed and there is very few which are showing promising new features

Though it is possible that one of these days or maybe years after bitcoin will be surpasses by other altcoin but maybe not for a long term cause when people heard about cryptocurrencies in the web, bitcoin will be the first altcoin that comes into their mind since it is really popular, and to tell you bitcoins price is still increasing.
And if times comes that bitcoin will be surpasses by other altcoin maybe i would also invest, but it doesnt mean that im going to leave bitcoin because i stiĺl want to hold bitcoin.

I can't see that scenario happening in near future at all. Currently bitcoin is a very strong flagship of crypto and i can't imagine alt surpassed bitcoin. If we are talking about 10 years later maybe it can happen as bitcoin tech will be outdated.