I guess, the only one who can give accurate answers for this matter are the management of the said company. But I think, bitcoin system needs to be improved and be more safe first from the hackers so that all users of Apple will be satisfied and contented to engage with cryptocurrency.
Yes, the authority to be able to provide certainty is only the company itself. and indeed we cannot deny that bitcoin is still a lot of negative side for now
Adoption weren't that good up to now, but if it became boom again, and Apple sees it they can definitely give a big impact for its price but for now they might have no plan at all.