What does it mean to be solidly built?

What does the phrase "solidly built" truly entail? Is it referring to a structure's physical robustness, its foundation's unwavering stability, or perhaps the resilience and steadfastness of its creation? In the realm of finance and cryptocurrency, does it signify a system's ability to withstand market fluctuations, protect user funds, and maintain operational integrity? Or could it be a metaphor for a project's well-thought-out architecture, robust security measures, and unyielding commitment to transparency and accountability? Clarifying the true meaning of "solidly built" is crucial to understanding its significance in various contexts.