Do you mean to say XLM wil replace XRP very soon ? This is what I understand from your theory that XLM's volume is getting increasing which will take it to #2 on coinmarketcap @vozphongtom. I don't believe because why would they want to degrade their one project by the other. Stellar is good project but when market will rebound ranks will be changed again. These are not permanent ranks and keep rotating from #2 to downwards.
I'm quite impress by stellar's direction of development. Even though Xrp is ahead of the race, XLM has every chance to catch up, as the project is being versatile and pursues various niches. Only time will tell who will be ahead of the game.
I didn't really expect Stellar to become a solid top 5 in crypto. Ripple is older with too many supporters and influence though. But what Stellar achieved so far is already great. And if the same pace continues then who knows this will reach the top sooner.