The popularity of Bitcoin in the future will most likely increase and there will be more adopters compared to today. However the increasing popularity of Bitcoin will probably be a problem for governments because it will disrupt the distribution of fiat and it is likely that the majority of governments will not allow Bitcoin to become more popular. So I think whether Bitcoin will become the dominant currency in the future is quite unlikely because government regulations are increasingly strict. Moreover, until now most people treat Bitcoin like an investment instrument, so even though the adoption of Bitcoin is increasing it is not because Bitcoin is a currency, but an investment instrument with a good ROI.
In fact, it is true that the hype of Bitcoin is much higher in modern times than it was in the early days when Bitcoin was known as an anonymous one. Meaning, when Bitcoin adoption was very few. In the current era, many people have adopted Bitcoin; even some countries have made Bitcoin a legal tender. And now it is possible to accept Bitcoin as the dominant currency in the future, but the current reaction of the governments of different countries has created hurdles for the public in Bitcoin adoption through restrictions, etc. But I think that in the future, Bitcoin will definitely be accepted as the dominant currency the world will recognize. Because the foundation of Bitcoin has been built on the basis of these qualities, which is the best solution to solve the financial crisis with a reliable status standard or to make it easy to understand.
Tesla accepted bitcoin in the past, but it is no more accepting bitcoin again for now. But there are many companies and sites that are accepting bitcoin through payment processor.
As far as I heard from major experts, Tesla's acceptance of Bitcoin as payment was a plan to manipulate the market. In which his aim was to pump or dump the market by taking profit margins. Why is it obvious that Elon Mask is the owner of a large asset, which will have an impact on the market? In addition to Tesla, many companies have also accepted Bitcoin as a payment, including Starbucks, Shopify, Subway Gyft, AT&T, and Newegg.com, and this is also a better decision for the digital generation. Besides, it possesses the qualities of a better value store, a profit-getter, and an immutable one.