I suppose (most) the alternate block-chains would be considered semi-precious.
I like the fact "precious bits" seem to fit nicely into gaps in
the Fintrac Guidelines. Until now, I was assuming that a "Money Service Business" would be the closest analog. (Though I fail to see how "alternative money remittance systems, such as Hawala, Hundi, Chitti, etc." can be reasonably included.) Precious Bits neatly fall outside the scope of "Dealers in precious metals and stones", at least until the law/regulations are changed to include "bits" (with the clarification that copyrighted works are not considered precious because they can easily be copied).
Edit: Which bits, specifically, are precious? Only the block-chain (and some novelty addresses) are computationally intensive. The private key (for a funded address) is what lets you move/create/destroy/merge/split
funds precious bits.