Every income is taxable unless specifically exempted. As per the Tax rule, anyone who will be earning income with the exchange of Bitcoin, that income will be included in their taxable income.This will be included in their Self-employment tax. These type of tax rule shave made the income of bitcoin designated as the possession of valuable good like gold or land. To execute these phenomena every transaction of the bitcoin will be linked to some or the other local fiat currency, so if the bitcoin is exchanged the transaction value is recorded in USD to mark the current value for tax reporting. transaction carried by any individual will be paying the tax in their respective country in their currency. The USD is only to track the global value of the transaction. IRS will also allow you to file capital losses worth $3000 per year. Every country has different set of rules on Bitcoin but no one has completely defined it in a way that user can benefit and understand. I’m just glad to read about this that at least everything is been tracked by the government and is filed for individuals. This makes money laundering and unsafe usage of bitcoin very hard.
Reference:
https://bitcoinmagazine.com/articles/tax-day-is-coming-a-primer-on-bitcoin-and-taxes-1459786613/