How many people trade BRK-A?
1. BRK-A is not a currency or money
2. You cannot divide BRK-A
you can divide BRK-A by using BRK-B instead
.
I think the point is the higher is the price of an item/commodity/even currency, the less interest is in buying and selling it (trading) for purely psychological reasons.
Most people don't want to buy fractions of most things, so this argument is largely mute.
A few people I know commented: bitcoin is too expensive.
Gold is also expensive at $1200 a troy ounce, people still buy it.
You can also buy smaller coins or go for an alt-coin (silver).
Gold doesn't care if it's expensive, neither does bitcoin.
Of course, bitcoin does not care, but people do.
If bitcoin is mostly a commodity (like gold), then ~$400 is fine
If bitcoin is mostly a currency as was suggested in prior posting, then $400 for a main currency unit is too much. There are no other currencies that are so expensive per unit.
It is purely psychological, but to deny that people are put off by this price is unrealistic.
The solution is in Bitcoin Foundation proposal. 1,000,000 XBT per each BTC.