Yeah, I saw the futures on HITBTC, granted they are trading IOU's, are roughly going for 0.75 cents. I know it's not 600 million coins in the wild at once, but it could be a fair indicator. If BTC is ~$1900 and Tezos is ~0.75 cents, when BTC will breach $3800, Tezos will be flirting with the 1.50-$2 range. This is without any dapp development :P
So yeah, I am stoked. Just 4-6 months until we know for sure!