I dont think bitcoin will kill off all other ALT coins. Imagine 5 or 10 years from now end users are selling their products online and accept multiple forms of payment BTC, ETH, LTE, etc. Why not??? Just look at this chart here.
http://coinmarketcap.com/charts/#btc-percentageThis is the total percentage of the market that Bitcoin dominates. And since the beginning you can see that the peaks are becoming less and less. So this means ALTs are taking up a bigger percentage of the total Crypto market cap.
I think BITCOIN will be a STRONG crypto. It will be the mother of all cryptos, people will buy it to branch into other ALTs if need be.
Yes that is right. Like fiat currency which has dollars, peso, yen, euros, and pounds so was bitcoin currency. Bitcoin was like dollars and other cryptocurrency are like peso, yen, euros and pounds. In a cryptocurrency economy it is not good to have only one currency but multiple but among them there is a primary currency that is above all them and that is bitcoin.