It's not that far off from real world USD (if you limit it to the US, and extrapolate for number of users) where 16,000 families making up the richest 0.01% control 11.2% of total wealth
It's not that far off from real world USD (if you limit it to the US, and extrapolate for number of users) where 16,000 families making up the richest 0.01% control 11.2% of total wealth
You could, however, control prices if you controlled 5% of Bitcoin, which you could cash out in USD or EUR.
There is no alternative to USD or EUR - at least not one that is widely accepted.
There IS an alternative to Bitcoin
The closest real world analogy I can think of would be that if all the unaccounted for physical US currency that is floating around outside the US all of a sudden returned 'home'.
In contrast, Satoshi's coins are currently outside the system, and adding them to the system would cause a whole bunch of instability.