Often, founding and running a technology startup is glamourized. People only hear and see the good articles and the big headlines on how many millions of dollars a few startups have raised.
For every startup that raises money or is acquired, there are hundreds and thousands of others that disappear after being humbled, sometimes brutally by the market.
This video, although funny and sad at the same time, sums it up perfectly. (Don't despair though, you can always get up and try again).