If you are given such an opportunity, it will be good for you - although most merchants that accept cryptocurrencies today use payment processors, which are in turn obliged to collect some data and share it with the authorities if requested. It's hard to hide anything from the authorities these days, it's just a question of how interested they are in doing something to bring you to justice.

However, some say that if you don't live in the country for more than 6 months, you can avoid almost all taxes - of course this includes visiting other countries and doing some things - if you want to know more, there are some interesting services on this link.