There is no universally correct funding answer, only the right answer for your market and your appetite.
The bootstrapped path
You stay default-alive. Every dollar of revenue is yours. You optimize for profit from day one because you have to. The constraint forces discipline: lean teams, careful spend, fast iteration. The tradeoff is slower growth and personal risk.
The funded path
Capital lets you outspend, out-hire, and out-market, which is useful in winner-take-all categories. But it resets the goalposts: investors need a venture-scale outcome, and "profitable but small" becomes a failure in their eyes.
How to choose
Ask one question: does my market reward speed and scale, or does it reward staying lean and compounding? Network-effect, land-grab markets favor capital. Niche, durable, high-margin markets favor bootstrapping. Most profitable indie SaaS lives firmly in the second camp.