But even if it don't pay taxes you should be careful in the transaction fees and or the exchange rate..
Bitcoin is popular now days so definitely recommend using bitcoin and earning bitcoin for a good profit..
well then that is a false assumption that people who are in bitcoin because of what you said, are making.
bitcoin is neither anonymous nor free of tax.
the anonymity part is obvious, you can even google about it or even read the bitcoin.org page to see it is not.
and about taxes, there may be countries which has not yet decided but in most places you have to pay taxes when using bitcoin.