People invest in bitcoins because they have seen the value that this crypto coin play in the cryptoworld.  As the leadinn coin, it has drastically change people's perception of this market.  From a non believer, we now have a lot of people going for this type of currency because it holds so much value compared to other investments and stocks.  Bitcoin has revolutionized the game as how they put it and this is so true because more and more coins are coming out every so often because these coins really do have the potential to make it big.  Because of the increasing interest and high demand for bitcoin, people are now moving towards investing in it too on top of their usual shenanigans with stocks because the market is more dynamic and really steadfast when it comes to growth.  So really to ask why should you invest in bitcoin is like asking, who would not want to get higher returns for things they have invested in in a relatively shorter period of time.