I don't really follow this. Are you suggesting that the value of a single bitcoin is too high or that the total value of all bitcoins (the "market cap") is too high.
I wish I can highlight the fact that I'm not talking about pure trading, but I try to care about potential customer mindset.
And that's why, I firstly need to get back to your point.
Also, I'm not sure where you got the "democratic" notion from. Bitcoin is really very much unlike anything I would describe as democratic. Care to elaborate?
My meaning was, the only way to see masses starting to adopt bitcoin as a new way to buy goods was to democratize it and to see small and medium businesses accepting to receive payment with this crypto currency
Then How can people start to use a new money ( a single bitcoin ) which is 400 times higher than their base currency. That's for me the real limit.
I still don't get the "democratize Bitcoin" sentiment. What do you imagine people would vote on?
As for the currency unit (thanks Jamie_Boulder for helping to clarify), don't worry. A single bitcoin is very valuable but can be broken into very small pieces. If these smaller pieces are thought to be sufficiently useful then they'll earn names naturally with time. Personally, I like to think and deal in terms of mBTC (which I call "mills") because bitcoins are too large for most things.
Also, notice that normal people deal with even larger jumps in currency units all the time. Consider South Koreans whose currency unit, the Korean won, is worth about 1000 times less than the euro, yet ordinary Korean people are capable of visiting Europe and using the currency without any kind of special training.