Non-profit, educational, or open-source Bitcoin initiatives benefit from the .org positioning. The TLD signals "community-oriented" rather than "commercial" — useful for Bitcoin academies, research foundations, advocacy groups, or open-source tooling.
.org reads as institution rather than as vendor. Foundations, standards bodies, open-source projects and educational initiatives use it, and in Bitcoin — a field built largely by non-commercial contributors — that association is stronger than in most industries.
The practical use is a second face for a commercial brand: documentation, an education arm or a non-profit initiative can live on .org without diluting the product site.