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<p>[QUOTE="AncientJoe, post: 5461690, member: 44357"]I am a minimalist person and prefer my collections to be relatively small. I have some friends with tens of thousands of coins and others who will never break fifty; it's very much a personal choice. </p><p><br /></p><p>One of my factors is the replaceability of a particular coin: if I can find another one in a year, do I need to own it now? Every purchase has an opportunity cost by tying up funds which could potentially be used to buy another coin.</p><p><br /></p><p>My more esoteric approach (coming from a software/mathematical background) is trying to define my collection as a <a href="https://en.wikipedia.org/wiki/De_Bruijn_sequence" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://en.wikipedia.org/wiki/De_Bruijn_sequence" rel="nofollow">de Bruijn sequence</a>. While I don't adhere to this 100%, I'm essentially trying to cover the broadest possible set of major themes in the fewest number of pieces, ideally having each coin add more than one novel major attribute.</p><p><br /></p><p>There is, of course, an arbitrary level of granularity with which coins can be differentiated and no hard-and-fast rule to follow but it at least makes it sound as if I have some plan.[/QUOTE]</p><p><br /></p>
[QUOTE="AncientJoe, post: 5461690, member: 44357"]I am a minimalist person and prefer my collections to be relatively small. I have some friends with tens of thousands of coins and others who will never break fifty; it's very much a personal choice. One of my factors is the replaceability of a particular coin: if I can find another one in a year, do I need to own it now? Every purchase has an opportunity cost by tying up funds which could potentially be used to buy another coin. My more esoteric approach (coming from a software/mathematical background) is trying to define my collection as a [URL='https://en.wikipedia.org/wiki/De_Bruijn_sequence']de Bruijn sequence[/URL]. While I don't adhere to this 100%, I'm essentially trying to cover the broadest possible set of major themes in the fewest number of pieces, ideally having each coin add more than one novel major attribute. There is, of course, an arbitrary level of granularity with which coins can be differentiated and no hard-and-fast rule to follow but it at least makes it sound as if I have some plan.[/QUOTE]
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