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It's arbitrarily divisible, up to the limit of a float though right? So nominal prices can keep "decreasing" in bitcoin for a long time. Maybe that's just too much work to keep the prices reasonable? Edit: they can't actually be using a float for money though, right? So what is the actual limit of divisibiity?

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It's divisible to the 'satoshi'[0], but could be changed in the future.

[0]: https://bitcoin.stackexchange.com/questions/114/what-is-a-sa...

Yes, people could increase the subdivisibility -- and break a lot of JavaScript implementations in the process.

It's clear that Satoshi either had some affinity to JavaScript or was otherwise familiar with people who are crazy enough to do financial calculations using double-precision floating point numbers, from the fact that the upper limit of existing satoshis is so close to what fits into a double-precision mantissa.

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