Hello, community! I'm new to Bitcoin self-custody and would like some help to better understand some issues.

I currently use the Bipa app to buy Bitcoin BTC and then transfer it to my personal wallet (BlueWallet), as I believe that "neither your keys nor your coins". However, with the new 17% tax rule on cryptocurrency profits in Brazil, I'm concerned.

My questions are:

Self-custody vs. Taxation: Does keeping BTC BTC in my own wallet really protect me from being tracked by the IRS?

Legal strategies: Are there ways to not declare or structure transactions to reduce impacts, since the government already collects a lot of money and it all goes to politicians' pockets?

Privacy: Should I migrate to wallets like Wasabi or Samourai (CoinJoin) to increase anonymity?

I appreciate any guidance or experience you can share!