Cashing out from Bitcoin or most cryptos isnt very hard, depending on which exchange you use. Some OTC exchanges buy back cryptos and you can just place sell orders and then request a withdrawal from ones that deal in USD/USDT or local currency.
Your tax implications will depend on which country you are in and also the country of the exchange you are using, if different from your own. I would recommend looking into your tax obligations and seeing if the appropriate authority has released a statement or guidance concerning cryptos. I understand that some countries determine that a taxable event happens upon sale and realization of gains or losses, while others require that you pay tax on unrealized gains.
If you are trying to hide from tax authorities a transaction over 10K is probably a bad idea as a number of countries have that as a transaction that requires being reported.
On a more important note, you should pay your tax. If you like roads and health care and emergency services pay your fair share for them.
Roads, health in our country is bad.
Taxes on how much I understand will cost 19%, and the crypto currency is not entirely legal.
So it's not so easy with cashing. Although a large number of people work as it is with criticism and large sums.