I don't know if anyone can properly guess if a consumer startup is going to get traction until it does A classic example is the drug Viagra, one of the most pr

I don't know if anyone can properly guess if a consumer startup is going to get traction until it does A classic example is the drug Viagra, one of the most profitable consumer technology investments in recent history. Its (most profitable) use today was originall reported as a "side-effect" in early clinical trials.