Considering the Netherlands’ strategic ties with the US, this sounds like quite a bold move. France doing so was one thing, but the Dutchs have always been rather Atlanticists.
That was indeed the case
They're still hoping to get back New York City some day.
They are also consummate antifascists, which I suppose is in tension now with atlanticism
For what it's worth, the Dutch Central Bank argues that this is simply because it'd be easier to sell in London in a crisis situation.
They've previously stated to be far more worried about the dependency on VISA and MasterCard than the gold reserves in the US.
https://nos.nl/artikel/2560460-dnb-maakt-zich-zorgen-over-am...