Funny how people are talking about avoiding taxes as something illegal,
There are tons of legal ways to avoid taxes,
Do your research and you'll find plenty of ways especially if you're going to set up a business (You can form a company in Cyprus, Malta, Hong Kong, UAE, Seychelles... but you'll need guidance and do your homework),
If you're into something shady business, I can tell you from now that BTC is not anonymous,
And even if you use Monero you should know the right way or you'll be tracked easily,
You'll need a complete anonymous company / EMI formation (Provided by some services) so you can receive and use the money anonymously,
But you'll need to know how to access the money and use it without revealing your real identity online.