If there are no competitors I generally worry far more than if it exists. I have built many things that do not exist and found out why they do not exist; there

If there are no competitors I generally worry far more than if it exists. I have built many things that do not exist and found out why they do not exist; there is no (sustainable) market (even though we did some research which showed enough market, but turned out there was not or at least not enough to reach that market with limited/bootstrapped means). I have also built many products into (we then thought) saturated markets (dating, free hosting, ...) which did well for us.