Hey Craig. The total number of bitcoins is indeed limited. True, bitcoin is highly divisible. But so is gold. Actually, gold is more divisible than bitcoin (technically it's infinitely divisible). But divisibility doesn't make gold (or bitcoin) less valuable. In fact, that property makes it more useful as money. Gold never would have caught on as money if it wasn't highly divisible. And neither would bitcoin.

Also, from a purely math standpoint, you can't say bitcoins are unlimited just because they are highly divisible. As an example, if you divide 1 bitcoin into 1000 parts, you don't have 1000 bitcoins. You have 1000 1/1000ths of a bitcoin, which is still 1 bitcoin.

Likewise, the total number of bitcoins that will ever exist is ~21 million. Each bitcoin can be divided into 100M satoshis. That doesn't mean there will be 2.1 quadrillion (i.e. 21M x 100M) bitcoins in existence. It means there will be 2.1 quadrillion satoshis in existence...which is exactly equivalent to 21M bitcoins.

Na mean? :)