Interesting, you already have the dec 18 value while the day is far from over. You have a strange way to pick up numbers.
As parent said, with Bitcoin you have to look at things in a different way since it works in a very different way than anything else we've ever seen.
> because Bitcoin can have as much as 30% variation in a given day
Hence, "pretty fucked up".
No major currency suffers from 30% intra-day volatility against other currencies. It would make pricing goods and services essentially impossible. Who would care about saving up to 5% on credit card fees if they're suffering 30% arbitrage losses because they set/update their prices at the wrong time of day?