I see a view that classifies the value of Bitcoin as an illegal value, and I am very opposed to it! Anyone who has learned a little bit of blockchain knowledge knows that the blockchain has a feature called immutability. This means that the transactions posted to each block cannot be modified. There is also a feature called traceability, which means that the source of every bitcoin is recorded. How much money you have is not based on a ledger to write your current balance, but from now on. The original mining source of this money. So Bitcoin is difficult to use illegally.