hi friends background, how are you today?

Today I found a strange discovery when I cleaned my room, when I was tidying things in my room, I found some foreign currency coins, and maybe this included old money not selling anymore or still selling well I don't know,including metal coins that I found were Singapore, Hongkong, Netherland, and one more thing I didn't know what currency, obviously all of these currencies did not apply in my country, maybe this could be a unique collection or become an old coin antique, , I am also confused as to why this coin is in my room, whereas I have never been to those countries,

and here is the coin I found :

1.Netherland currency making in 1929,

I think this money is old and may not apply anymore.

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2.Hong Kong dollar was made in 1993

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3.Singapore making currency in 1990

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4.Malaysian currency manufacture in 1980

and a few more currencies that I don't know where they are from.

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maybe I will save this money well as a collection, maybe this money can be sold at a unique price too because it belongs to the category of antique money or old money.