There are about 39 billion XRP in circulation vs about 17 Million BTC. 39/17 x 1000 = 2,294 xrp per Btc. If XRP would overtake BTC marketcap at $6 per XRP. by my math (roughly). So in todays environment $6 XRP is all the money and it will likely be a rocky ride to get there. Profit taking. So its a double or triple proposition in the short run. Other Alt coins may offer better upside but at greater risk. Still, XRP looks like a good play.