Europe’s top court is about to making a ruling on the issue of value-added tax (VAT) for bitcoin exchanges—a decision that is seen to have far reaching effects for digital currency in the region.

Business Insider reported the European Court of Justice (ECJ) could decide that purchases made at bitcoin exchanges are VAT-exempt, which means Europeans can go on their merry way buying cryptocurrency without paying tax.

The court, however, could go the other way: it could say that tax should apply to the purchase. Worse, the court could decide the bitcoin itself should be subjected to tax, according to the news outlet.

The upcoming ruling stemmed from a dispute between David Hedqvist and the Swedish tax authorities.