Much like the saying "a stock does not know who owns it" - you're right that Bitcoin will not change based on the short term desires of new owners or people who think they might be able to tell which way the wind is blowing tomorrow. We've seen that it is a heavily erratic asset but I would actually disagree with the title of this thread. On a macro scale, the fact that companies like Amazon and Tesla hint at accepting payment in a certain format is bound to give credibility to Bitcoin. Amazon is the biggest online retailer (outside of China) and if people see that it favors certain payment methods that they can invest in - the masses will flock to it. Some people might have little faith in Bitcoin but a big name like Amazon lends it a huge reputation boost if there is even a hint of "endorsement".