Bitcoin and Ripple aren't competitors; they aren't trying to achieve the same thing. Bitcoin is far more general-purpose, whilst Ripple has a very specific use-case. The future has room for both of them, and for other cryptos too. Smart contracts, for example, will surely be huge - so that's Eth or something similar, and again no real overlap with Bitcoin or Ripple.

It's not a winner-takes-all race. I hold Bitcoins, and Ethereum as well, and I'm keeping hold of them long-term - I believe very strongly in both of them (and several other coins), but I believe in XRP too. I've read so many posts on so many threads, and I've yet to see a convincing argument as to why XRP won't succeed.