The Surinamese Guilder was the fiat currency of Suriname until 2004 when the Surinamese Dollar replaced it. They - like all fiat currencies - are legal tenders whose value is backed by the government that issued it. It shares the same similarities with gold, but a crucial difference is that the government can create as much currency as they want, which in effect makes the currency lose value over time. It is not that goods are getting more expensive, but rather the currency losing its purchasing power.