In most developed countries, it is necessary to conduct transactions through the banking system so that the use of cash is scarce, the government can easily legalize bitcoin. In countries where bitcoin is legal, they allow the exchange of local bitcoins or trading platforms to provide exchange services that are directly linked to the bank and also have taxation on the income of crypto. They think that the adoption of Bitcoin may lead to the collapse of some banking systems and also the means to prevent money laundering. What if something very wrong happened in the bitcoin world and the citizens lost huge amounts of money, who was responsible? Who should we complain about? Is there any support or authority that we can protest? Or at least ask for help?