There's something on my desk that might change everything or might be nothing — nobody can tell me which — and the whole room is telling me to wait.

In twenty fourteen, Abigail Johnson put Fidelity into Bitcoin mining.

Not a memo about Bitcoin. Not a working group. A mining operation.

Running.

Inside one of the largest asset managers in the world — at a point when most of finance wouldn't say the word out loud.

The thinking was simple. Start now. Don't wait for it to make sense. Build something small, watch what it does, learn what works.

Traditional finance pushed back. In Johnson's own words, the noise was immature, but very loud.

She built anyway.

And Fidelity was first — first to institutional custody, first to a crypto trust charter, first to Ethereum custody, first to a spot Bitcoin ETF.

That's not luck. That's a method. And it has a name.

Effectuation.

So let's go and look at it.

So, the situation Johnson was actually in. A technology that might matter enormously, or might amount to nothing. No way to tell from the outside. No precedent to copy. And a roomful of people, loudly, telling her to wait.

The feeling is exposure. Move, and you might be wrong in public. Wait, and you might be late.

That's the choice — and it is a choice, not a forced move, because there were other Plays on the table. She could have waited for consensus. She could have partnered — kept Fidelity's name at arm's length. She could have hedged: a public statement, a watching brief, nothing built.

Johnson chose a different Play. And it has a name. The behavioural model behind it is Effectuation — framed by the economist Saras Sarasvathy, who studied how expert entrepreneurs actually decide when the future genuinely can't be predicted. They don't start with a goal and work backwards. They start with what they already have, take a step small enough that being wrong is survivable, and let what comes back shape where they go next. Affordable loss, not expected return. Johnson's mining operation was exactly that — a small, survivable bet that turned uncertainty into evidence.

That's the Play. Pick the wrong one here, and the cost isn't a bad quarter. It's three years of learning you never did, while someone else did.

The Play has a shape you can run. That's the Plan — and the Plan has a tool.

Lean Startup.

Eric Ries wrote it down in twenty eleven — a way of building products when you don't yet know whether you're right.

It exists for exactly the situation Johnson was in. Uncertainty you can't plan your way out of. New market, new product, new customer — where your early assumptions are almost certainly wrong, and the standard tools, the roadmap, the business case, the five-year plan, are confident about things nobody actually knows yet.

Here's the move that makes it different. It replaces planning with learning. You stop treating an initiative as a project to deliver, and start treating it as an experiment to run.

It runs in a loop. Three steps.

Build.

Make the smallest version that tests the real question — the Minimum Viable Product. Not the cheap version of the finished thing. The smallest thing that produces an answer. For Johnson, a working mining operation was the build.

Measure.

Put it in front of the actual world and watch what the world does. Real signal, not opinion in a meeting.

Learn.

Read what came back, and make one explicit decision — persevere or pivot. Keep going on this path, or change it. Out loud, on the record, so the decision is a decision and not a drift.

Then round again. Build, measure, learn. Each loop cheaper than being wrong slowly.

So what do you get from running it?

Not certainty — you don't get certainty. You get a quarter that taught you something. A direction you can defend with evidence instead of conviction. And the waste you didn't incur, because you found out small instead of finding out large.

One warning.

The vocabulary is easy to borrow and the discipline is hard to keep. MVP, pivot, validated learning — say the words, skip the work, and you're running theatre.

The test is simple. If your experiments always confirm what you were going to build anyway, you're not learning. You're shipping with better branding.

So here's Your Next Move.

Look at the last three months. One honest question: what have you actually learned that changed your plan? If the answer is nothing — you weren't running experiments. You were just shipping.

Pick one initiative. Find the smallest real version of it. Put it in front of the world this quarter, and let what comes back decide what happens next.

That's one Playbook. There are forty.

What's Next? Forty Playbooks for a Position you recognise, a choice of Plays, and a Plan with the tools you'll need to deliver. Every Playbook walks through Precedents from leaders who made it work for them. Find your Play and Your Next Move.

What's Next? — The Leader's Playbook.