The ATH was around November 28, 2013.
The "circulated" amount was around 12 million (I eyeballed the blockchain.info charts)
https://blockchain.info/charts/total-bitcoins?timespan=all&showDataPoints=false&daysAverageString=1&show_header=true&scale=0&address=
I do not think so.
I believe the price rise is a combination of speculation due to the halving as well as
the miners (mostly the large Chinese farms) pumping the price to the new "norm", so after the halving
they do not make half of what they made prior. They need to get the new "norm" to be around 700+/- USD
to make some profit when btc becomes 12.5 per block.
This of course is pure speculation as well, but I think it makes some sense. Otherwise the miners will be
willing marching themselves off a cliff with their eyes closed. My speculation is the only way that they will
survive the coming halving, besides millions of new users entering and pumping the price naturally.