http://coinmarketcap.com/charts/#btc-percentage
This 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.
I agreed, Because in my assesment all crypto in altcoins are depending to bitcoin,.without bitcoin crypto will not be created but since the main reason why altcoins appeared it shows that both of them are helping to one another. So it is very cleared that in the near future many cryptos in altcoins will become stronger like the origin of the digital currency.