I'd give bonus points to #2 if the idea seems so bad that you go though periods of doubt yourself, but keep on returning to the view that "it's great".
If you're absolutely certain of yourself, chances are that there are others out there who are just as certain, so you will have competition. If you're uncertain, and feeling lonely, there's a better chance that you have the field to yourself.
My experience of this is being involved in the development of the first WiFi (802.11a) system. It was only with hindsight that the significance was clear. The reality at the time was an isolated toil in the dark, not a high flying roller coaster ride.
If you're absolutely certain of yourself, chances are that there are others out there who are just as certain, so you will have competition. If you're uncertain, and feeling lonely, there's a better chance that you have the field to yourself.
My experience of this is being involved in the development of the first WiFi (802.11a) system. It was only with hindsight that the significance was clear. The reality at the time was an isolated toil in the dark, not a high flying roller coaster ride.