Received as a gift about 10 years ago.

I received this from a friend about 10 years ago.

I believe it is 

2001 Niue Pobjoy Mint FLYING ACE AND THE RED BARON $100
Gold (.999) 

thank you for any info. Not sure whether to sell or hold onto. Very not aware of what it is worth.
 

If genuine it is worth its bullion value which today is $909.94 U.S.

For reference:

N#328214

And Harry's right about value. Novelty coins like this are worth their weight in gold give or take a few percentage points depending on the buyer.

Thank you very much for the answers.