​Solution to online transfer identification

Aqui está uma versão mais resumida e corrigida em inglês:

Hello, everyone. In Brazil, we are monitored and can’t freely express our opinions. I want to solve one of the problems that is anonymizing online transfers for people who need help. Many flee to other countries, especially the US, to avoid being jailed for their opinions. In Brazil, many request help using PIX, a simple bank transfer using an ID number. Since the central bank associates the ID with a specific bank account, helpers can be identified. I thought of using Bitcoin to solve this, but someone would still need to convert the money, which means they could be identified by the system. I thought about another methods, but i would like to hear you guys. Thanks