"I believe Ripple can and will produce extra coins to combat price rises of the coin, so that kind of worries me."

"Not only is there a finite amount of XRP — just as with Bitcoin — XRP is actually a deflationary cryptocurrency, which means that a tiny amount of XRP is permanently shredded after each transaction. It’s the opposite of unlimited supply. As time goes on, the supply of Bitcoin remains the same while the supply of XRP will actually shrink, making it even more valuable with each passing day."
from:
http://www.huffingtonpost.com/entry/ripple-and-xrp-are-more-stable-than-you-think_us_591cb3bee4b0b28a33f62915