Yeah, that's what I'm concerned about. I think the tech specs of the coin might be too tight, introducing these kinds of weird cycles that shouldn't be happening. It should only decrease the supply, never jump back to 500,000,000 for any reason... so I'm a bit concerned that we might end up crashing the whole thing pretty soon when the numbers get too large for even a 64-bit number to support (remember, we have to add 8 more 0's for the decimal places!). Could already be what's happening with the 3-million to 500-million loop-back. :/

But oh yeah, I think we've totally blown way past the 100-trillion mined mark already.