I'm holding a few NEOs, so I certainly hope it can go up that much in 2 years. Realistically though, it's better to hedge the bet and invest in some promising gen 2.5/3 coins also.
NEO is actually a good coin to hold for long term, we have noticed how far it grow every year same thing happen also with others. NEO market price isn't high volatile compared to Ripple and some known coins, it means that a lot of people are on helping this to grow more and having a long years of journey.