Most of the cookie banners are breaking GDPR. The requirement under GDPR is that privacy must be the default and users can select to opt in. So most of the banners you come across that default to all tracking are against the law already. The legislation didn’t stop them being annoying in this way but a few prosecutions for the breaches and dark patterns would set things off on a better path.
I have used Bitcoin a number of times for international purchases. Its not really got to the point of currency so much as a medium mostly of speculation and often interchange for crime but it can improve your privacy. The user experience of the payments isn’t the best but international transfers are often hard to do anyway and in that particular field it can often be a lot quicker, cheaper and easier.