I would think 1BTC coins from original series won't always have a x3 multiplier, but certainly they will be traded at a premium over face value.
I was thinking scarcity in an inflating economy (cost of goods and services rising) when I bought them.
But in reality it is Bitcoin that is scarce.
Although the physical coin adds value, the value is subject to deflation (cost of goods and services decreasing) as the economy is deflating.
I have my droughts that the Casascius coins novelty value will keep up with deflation.
They will always be worth more than 1 Bitcoin each, but they will unlikely ever be worth 2.28 Bitcoin's each.
The added "premium" value cost more than face value, but it is worth less.
I feel so stupid; I even bought first print runs of the Bitcoin magazine ( with Bitcoin's) thinking it would be a collector's item, and now looking at the deflation in Bitcoin economy I realise, the novelty value will never keep up with actual value of Bitcoin, in other words -
hard lessons: don't spend your money while the economy is in deflation. (just buy the essentials and save the rest. )