Very few coins will manage to do it at the end of the day and of course these coins will get enormous value.
The only thing you have to do is to find out which coins will enter the market of real currencies.
Technically, the price of bitcoins are directly proportional with some price of altcoins. Since there are various altcoins in the marker, investors usually diversify their investments by investing into different cryptocurrencies in order to reduce the risk of losing everything in one fo.
Once the prices of bitcoins decrease, this will open another opportunity for altcoins to dominate the market. That is why whenever bitcoin prices are low, people tend to pull out their investments and shift to altcoins.