This makes bartering more expensive when bartering with foreigners. For example if a Norwegian where to trade 1000 USD worth of gold for a new pc with someone in the us, the Norwegian would have to pay 1250 USD for the same gold (1000 USD in gold, 250 USD in vat). Same for BitCoin. One will need to pay vat when buying them.
However one can buy 1000 USD in gold coins for 1000 USD because the coins are considered a currency, and thus not subject to vat.