When there's an obvious idea that is relatively easy to execute, as soon as there's any signs of success you'll get a dozen fierce competitors.

At that point it's a race to who can attract enough capital, execute most frenetically, and gain an edge in any way possible.

For example, after Bird scooters 4 years ago showed there might be a there, there, there were a dozen or so competitors within months.

How much this dynamic happens boils down to: "given the elevator pitch, how well could the median entrepreneur execute on it?"

If the answer is "quite well" you'll have a tiny amount of time to get a head start and then it will become a ruthless red ocean.

Execute in stealth, try to get the biggest possible lead before everyone else notices.

If the answer is "not at all," then once you clear the "there might be a there, there" threshold, it's blue ocean.

It doesn't matter who you tell, because no one else can execute the idea anyway.

It requires a subtle, nuanced cocktail of specific knowhow.

The more people you tell, the stronger the idea gets, as the idea builds in people's minds, as you get disconfirming intel to grow it stronger.

There is a huge asymmetry of a big idea that only you know how to execute.

The most differentiated ideas are ones that everyone can grok, on some abstract level, quickly... but no one else can execute.