forex markets - no limit up/down
futures markets - has limit up/down
stock markets - has limit up/down

In theory, BTC is most like currency trading.  When the market gets more established, limit up/down will not be needed.  

Getting more businesses and merchants to accept Bitcoin as payment will do wonders to attract the masses. 

I am not aware if an "independent Bitcoin broker" exists today. 

There is perceived (and real) value already.  Real real money is being invested and traded for Bitcoin and that will not change in the near future.  

There is enough believers, users, investors, traders, businesses and miners now already, today to not let a drop / blip in price decimate the entire market.

It depends on the investor's risk tolerance.  

- If they are investing then the answer may to be to never sell.  
- If they are trading then it is a game of when to buy and when to sell.

If you knew 1 billion more people will be drinking coca-cola in the next 100 years, would you try to figure out when to sell their stock?  Or sit back through the peaks and troughs and enjoy the long term rise in value of the asset you invested in (and pass it on to your heirs)?

For Bitcoin, no one knows if it will be around that long.  Some think it will.  Some don't.  

There is a big difference between "spent" and "invested" !   

1password is also great.  Not free but great for mac users.

I really don't think we need names for these things.  It will complicate things for normal users to have to remember all these names for 8 decimal places.

Please send me "0.00000001 Bitcoin"

is fine.


(not that you would ever even need to ask for that amount)