Bitcoin is in the process. But what other altcoin can make the most out of the craze in the market which Bitcoin has created. I think that it will take few more years for the other cryptocurrency to become a mainstream currency. And it will remain to be a financial asset for time being. XRP and WTC may come out the earliest to the market with the things going around them.
In my opinion the only alt-coins that are going to fare well in the coming years or be able to secure themselves a place in crypto are the coins that bring something new to the table; the coins that fill a need, or bring a solution to a problem are the ones that are going to be adopted, traded and worth investing into.
The current fees, and slow transaction confirmation speed will most likely drive the price of something like DASH up, because it is a pretty solid answer to the biggest problem of the day for bitcoin. It seems like alt-coins do their best when bitcoin is at it's worst, so you have to analyze which coins are actually remedying a pain-point and tell those apart from the pump-and-dump ICOs.
Bitcoin remains the most secure and still has had a couple of issues over the years in that area, but people can't feel secure using a coin if they can't move their coins freely, either.. So this gives you an idea of what coins to keep your eye on and when. It is also incredibly difficult for the regular person to get into bitcoin, acquire a bitcoin, so in that respect other coins also give beginner's an easier time when they're first getting into crypto; there are just too many variable to tell you a list of coins that will perform, but some simple criteria will give you an algorithmic approach to picking alt-coin winners..
