Regulation is coming and there is no way we can bypass. If regulation comes in that means the tax income out of crypto is another norm too. So in short there is going to be regular taxation and regulation on the assets that are out. In short in the grand scheme of things there are going to be various local and global rules that would add upto taxes. 

As per their last years crypto bill draft they kind of planned this for between 15 to 20 percent of the bill. And it would make the residents and the investors both applicable for this type of the law. It would be interesting to see how the bill would bring more granular approach to the taxation. But people are not happy with the 20 percent cap of the crypto income taxation. Because that is very high amount and profit kind of gets lost in it. 

Another interesting thing is that with such high taxation, I think there would be exchange issues too. Like there would be less profit and most of the exchanges would go outside the nation. And this would also hurt the brazil economy if that happens. You never know when the socialist people tend to control more of taxes and then define the things that are about to happen with the new regulation, CBDC and other crypto adoption options. 

You can check out some interesting details about the Crypto bill here.