I see people buying them for 5x this rate (ie 10K = 1 BTC)
Yes, there are wily traders out there that are tricking noobs into paying such ridiculous rate for XRP, so what of it?
Buying at 10k XRP per btc is actually saying that Ripple is not only as good as Bitcoin, but actually BETTER. Now, I think this is a ridiculous statement for a system a few weeks into public beta as compared to a battle-tested and widely used 4 year old platform that is Bitcoin. In my opinion, people buying XRP at this level will regret it very soon.
One would wonder why there would be any interest at all then.