Eventually coins that people don't use are going to pop. Eventually there will be a coin that dominates store sales and web sales. People will move their money into that because they know it's won the adoption game. Yeah there will be other coins, but a normal distribution is the top coin taking 30% market cap, second coin 15%, third 10%... I forget what the distribution is called but it's already looking like this. It could be a different coin that takes the top besides Bitcoin though.