Opinion towards Cryptocurrencies has always been divided.
Where there is potential to collect amounts to the budget, the state will intervene by taxing sooner or later. This is the case with the currencies that generate substantial incomes. Theoretically, including in Romania, they are taxable according to the general rule, but still they are in an unregulated area. Practically, the legal vacuum expose investors to fiscal risk and, in the case of control, leave them at the discretion of inspectors. Recent history shows that many situations left "in the air" by tax law then turned against taxpayers.

thank you @ivoted