Rather than controversial, I think that BTC (& crypto in general) is free from regulation. It's a different thing really. In the same way that the trustless nature of cash makes it more valuable to criminals, it seems only natural that the digital equivalent would do the same.
days have passed by i think bitcoin now is controversial maybe because they think that bitcoin is scam so its controversial now but they dont even know the exact and what can bitcoin really give to them and they dont know what opportunity will give bitcoin to us, bitcoin is controversial because of the people that doesnt even know what bitcoin is they only think bitcoin is scam so that its controversial .