Ok, lets forget about Rijk and his personality for a while and stick to hard facts here then:

The question by the op on June 2 2016 was: "Is Gulden a good investment?"

1 BTC on June 2 2016 was worth $ 535.00, now it's worth $ 9,670. A profit of 1800%

That same BTC would have bought you 256,426 NLG (@389 sat) on that same date,
Which at current rate of 1,000 sat would give you back 2.57 BTC. A profit of 257%

Answer?: NO, if you kept your BTC you would have 7 x as much profit!