Ripple could never dethrone bitcoin. Price wise, by just comparing their total supply, it could never exceed bitcoin's achievement. And with the community bitcoin is having, bitcoin will continue its reign over other cryptocurrencies.
we all know the bitcoin is the most popular and the most valuable coin in the crypto.market, so the bitcoin gets the attention of the peoples. maybe their are some coins that has potentials in the market which is the coins next to bitcoin like ripple and ethereum, but it takes a long time before the bitcoin dethrone from its #1 spot.