Actually in the Bitcoin world, this is not true anymore.

It is very hard to actually to increase your Bitcoin holdings using just Bitcoin.

There is no in-built mechanism to increase your wealth with interest as it works in the fiat world.

Rather, Bitcoin, once fully matured, will have entropy in the sense that holders of Bitcoin can only either just hold or will slowly lose Bitcoins over the course of time.

this is a very interesting question, and in fact bitcoin is an experiment playing out before our eyes.

Most currencies start with a non-decimal number > 0, and are inflated over time.  EG. 5 pennies buys a beer in 1900; hundred years later 500 pennies buys a beer.

Or in Korea modern day, 1000 won buys you a candy bar; 10000 won buys you a cheap meal; 3.000.000 won/month rents a small apart-uh

So there is definitely merit to the idea of changing to mBTC - currencies in numbers > 0  are what humans are used to.

BTC, if the deflationary theory holds true, will only increase in value over time, and for everyday usage, ie. buying a coffee, the BTC units will go deeper and deeper into smaller decimals. This is unlike what people are used to and many newcomers may find it unintuitive.

Ie. a coffee costs 0.004 BTC; several years later it may cost 0.0004 BTC.
Dealing with so many decimals is quite difficult. Can you imagine if BTC reaches $100,000? How many decimals will you have to count out in order to send your friend 5 bucks??    decimals: 4 ---- (0.00005)


However, the experiment is interesting - perhaps people will adapt to bitcoin's small decimal and get used to it. After all, majority of bitcoiners today have
grown with BTC and are more and more used to sending amounts of 0.01, 0.001, etc. by  now.

Most likely in the upcoming years, shops will switch to mBTC prices, and software and websites will display both mBTC and BTC for an extended transition period.

I personally think switching to mBTC makes sense, and we should do it sometime in 2014.

Are humans used to a non physical currency that does not exist except for transaction records? no. There is no need to change something to suit people's needs. People will eventually change for BitCoin.

Really?  Do you think that will happen any time soon?  You would be better off if you stopped wasting your time trying to change Bitcoin, and created a coin of your own.  BrasilCoin perhaps?  I can see it now!

I'm sure you helped many people lives telling them what they have to do with their time. 

You spend far too much time trying to manage other people's lives. Guess what, one of my favorites pastimes is arguing with stupid trolls on the internet. Sue me.....

mbtc should be refered to as millibitcoin(s), following metric prefixes, which have worked very well for the majority of the world for centuries.