As with all advice, take with a pinch of salt.
A lot of people massively postpone their EVIL PLANS, for the simple reason that they don’t have an answer for every possible contingency.
They don’t know enough about the industry. They don’t know enough people in the industry—especially the A-Listers. They don’t know enough about where the market is going to be in five years. They don’t know enough about what could possibly go wrong. They don’t know where EVERY SINGLE LAST POSSIBLE LANDMINE is buried.