The risk is not having too little happening in one of these areas.
The risk is letting one of them consume all management attention.
Ignore the core and you lose the business funding your future. Ignore the next horizon and eventually there is nothing ready to take over. Treat every early idea as a business and you burn resources before there is evidence that it deserves them.
Leadership has to hold all three in view without pretending they should be managed in the same way.
A business does not grow from one place. There is the business that pays the bills today. There are opportunities that could become the next source of revenue. And there are ideas that are still too early to call a business at all.
The Three Horizons of Growth
Horizon One is the engine you already have.
It generates cash, supports the organisation and gives you the ability to invest beyond the current business.
Horizon Two is where the next engine is being built.
The opportunity is real enough to justify focus and investment, but it is not yet carrying the weight of the core business.
Horizon Three is where you place your bets on what could come next.
These are unproven opportunities that still need research, experiments and time before anyone knows whether they can become a business.