Can all these new coins really co-exist and have value?  I'm only asking because I'm confused about where to focus my attention.  I started recently with bitcoins (though shouldn't make that plural because I still haven't got a whole one - just a fraction of a minuscule piece of one!) then I looked at feathercoins, ripple, devcoins and litecoins.  I've read about at least half a dozen other alt-coins and really don't know if any, or all, of them are worthwhile pursuing.  Now there are Bestcoins - are they going to be best or will they eventually vanish into obscurity? Any thoughts?