What do you mean by approval? If you want some country to declare Bitcoin as the national currency, then I am afraid that it is not going to happen anytime soon. So for the next few decades, Bitcoin will exist as an investment asset, and not as a replacement for fiat cash. But at the same time, trading of Bitcoin is either legal or semi-legal in most of the countries around the globe.

Now let's talk about Mr.Buffet. Back in 2018 we had a major correction and Buffet used that opportunity to badmouth Bitcoin. But he has remained largely silent now, after the rally started. Last time I heard about him, he was suffering from dementia and involuntary bowel movements. He has around 1-2 years remaining in his life, and it will be better if we leave him alone to do his anti-Bitcoin rants.