Gulden is truly being held back by the lack of buying options and exchanges for international users.
When you read the history of Gulden you will know the team refuses to buy their way onto exchanges. They have the funds to bribe exchanges to add Gulden (like 99% of the other cryptos do) but won't do it and they know the Gulden price could of been a lot higher then it is today. The good side of all this, is it makes Gulden the best investment IMHO, you also want to be in Gulden before it becomes easily accessible to the rest of the world.