Converting Bitcoin to paper money will not make you free from taxes, but you will enter into some legal problems such as money laundering if you have a lot of money higher than the rate of income that was subject to tax.
You can reduce the taxes you pay or even avoid paying them if you exploit the legal loopholes in your country, and sometimes there are no clear laws for digital currencies, so you avoid them.

No one can help you unless you mention your country, and no one will help you in any illegal way.