Broad sense comes up say to commemorate currency component is precious metal (double color of palladium gold, platinic gold, pure bullion, bullion) commemorative money, average capable person marks bank note of money, souvenir character. Narrow sense comes up say even if money of precious metal souvenir and average capable person mark money character.
Theory collect value purely, actually about the same, be to commemorate place of someone something something is issued, have commemorative meaning and appreciate value.
Appreciate by investment value, the nature of domestic mainland area is precious metal commemorates money whole is a bit better, it is circulation general not quite big, 2 be besides afore-mentioned souvenir and appreciate value, much still value of a raw material (precious metal bullion) .
If say investment, the key still depends on circulation, current after all domestic the actual situation is commemorative money (no matter be precious metal or average capable person,mark bank note) cannot truly current use, loss is so negligible not plan, so the circulation of a few and the circulation of tens of thousands of appreciate dimensional affirmation is different, after all content with rare for expensive this is collecting a bound is consensus.
Generally speaking, precious metal commemorates money circulation very won't big, especially bullion or palladium gold, platinic gold, commemorate compared with money of silver-colored qualitative souvenir and general money wants character many little.
So, the place on put together is narrated, what have investment value most still is precious metal (especially gold is qualitative) commemorative money can have bigger appreciate space (the safeguard that itself gold is value) , nevertheless precious metal commemorates money and average capable person commemorate the ordering way of money and commemorative bank note is not quite same character, and do not buy by par value.
And collect value to basically see design and technology, 2 rounds of any of the twelve animalses with average for instance qualitative capable person mark money, double lubricious alloy is very beautiful, have good appreciate value. As to commemorative sex, about the same, general big theme can issue precious metal and average capable person pledge two kinds mark money, sometimes still commemorative bank note is issued at the same time, if 08 Olympic Games have precious metal,commemorative money, average capable person marks bank note of money, souvenir character 3 kinds.
