It had taken awhile until Harry decided that it was time to "collect" the Philosopher Stone, mostly because his parents made him feel sick for weeks. Finally, after getting them out of his mind,  he had decided to take the Stone with Hermione and Ron by his side. They had all readily agreed, though they did wonder what else guarded the Stone. With this in mind they still wanted a chance to nab a treasure that Albus Dumbledore himself was trying to guard.