Yes, it's very much possible for a startup to be successful in two years, with some factors included, which are : passion and drive, consistency, location and the type of business, I will talk about location and type of business. Location matters in business success most times let me use a real life experience to explain, when I was in school, bear in mind that I schooled in a Muslim community, a shop close to my hostel was taken and to the suprise of everyone the owner started selling alcoholic drinks turning the place to a beer parlour, we all know it was a dead on arrival business, assuming he was somewhere else that business would have been successfully possibly before two years, but the location and they type of business he started was not a nice combination.