It's the other way around. The more people are involved in a cryptocurrency, the larger the drag - because there has to be consensus BEFORE anything changes in the rule set. Small cryptos have the advantage that the developers have more freedom to change stuff as the blockchain grows. Also some stuff is either/or, like monetary policy and the likes.
I see. I wonder what will win, popularity or flexibility? I bet popularity has more chances of absorbing features from their smaller copycat currencies, than the other way around. In the end, the flexibility of the copycat projects may unawarely act, in practice, as little sandboxes for experimentation, which BTC developers can just sit and watch their evolution and then implement it in BTC itself.
Most people don't even know how paper money works. Still people consider it useful, b/c they buy stuff with it. Same will happen with bitcoin once the merchant accepts it.
The comparison with papermoney is unfair, because even though people don't understand how it works it is
already widely accepted for a millenia AND there weren't other better alternatives out there.
Bitcoins
still need to earn the trust of these people. It is still struggling to get adopted, and in practice... well it isn't that practical to use it anyway. Also pragmatically, from an UX perspective, it will not be that different from using the paypal/dwolla apps in smartphones (right now it is way worse, but that's what we can aspire).
We have to be honest, right now the only attractive for mere mortals (non-geeks) is speculating with the rally of btc prices.
Unfortunately, most people don't give a crap about anonymity, transparency, freedom, decentralization, deregulation, etc... It is like what Morpheus said in the Matrix, some people have been living in the matrix for too long and they can't get unplugged.
This is a characteristic for people who do not know what they want. If you know what you want and what you need you select on the spot.
The question is, how do you know what you want if you have too many choices?
And this is not a question of how knowledgeable or ignorant is a person, in fact, that's irrelevant as it affects everyone.
Don't be afraid. The focus will always be bitcoin. Copycats exist b/c people want to play around with the parameter set for bitcoin or pump&dump. Others innovate on various aspects of the cryptoprotocol - which has to stand the test of time before it becomes popular.
Just to be clear, I really welcome projects like Ripple because they genuinely introduce new paradigms... but the others like litecoin, ppcoin, whatever-coins, I wonder if they really are worth as standalone currencies.