Some industries including large subsets of the tech industry have become essentially zero-sum games. It's almost impossible to make money in those industries because they have been monopolized. If you happen to launch a software service in those industries, you will not be able to get any serious traffic from Google or social media because those platforms favor certain providers over others (e.g. US-based providers). Also you need to be careful of launching in an industry which is about to become monopolized.

So if you're not based in the US or you don't have many personal connections, you shouldn't dream too big; you need to find a niche which isn't going to be gate-kept.