I have lost track there are now so many alt-coins. Now there is a new catagory, joke coins. We have BBQ, Junk and YAC at least. Not to say that many of the others are not jokes either as some are clearly just get rich scams for the creator. If you have been around here for a while you will notice that ALMOST all alt-coins go to a minimal market cap after three months. The only exceptions are litecoin and Namecoin (just barely).
So why is there all of this interest? Who is buying them? Do people start buying them to set a price, then attempt to get out? I was able to mine a bunch of feathercoins and sell them for more BTC then I would have had if I just mined BTC otherwise. Someone is taking a loss. At the end of six months (or less now that there are so many) most of these will be worthless.
BBQ coin is one of the oldest coins still around. You discredit you're entire argument by lumping BBQ coin in with Junk and YAC.
Fantastic, the market will eventually purge what's not needed. I can't speak to why OTHERS collect them, here's mine:
Bitcoin - Straight investment
Litecoin - In case things go a bit crazy with the ASICs -- investment
Feathercoin - I'm bringing my resources (quite a bit) to help with long-term adoption
ChinaCoin - This is my gamble coin
I have a few thousand coins of the others 'just in case'. I'm only applying my time to Feathercoin.