Re: Just ban it already
You answered your own question "tax evasion". It's also anonymous to an extent so it's a nice place to stash large amount of ill-gotten gains. Rich people probably use it and rich people control politicians along with corporations. Also energy companies don't want it banned for obvious reasons and they have a big say in legislation. Sadly it won't be going away anytime soon. All we will get is token gestures and words from government.