For an ambitious founder, is it more dangerous to enter an emerging market five years too early or one year late?

Entering five years too early is far more dangerous. If you are one year late, you might face stiff competition, but market demand, customer budgets, and infrastructure already exist. Entering five years early means you burn significant capital educating a non-existent market, exhaust your team, and often run out of runway just as the ecosystem finally matures. Being right about the long-term trend means nothing if your timing fails to align with commercial readiness.