it is possible for a couple of reasons but also impossible for some other reasons.
1. they are pumping ETH right now pretty hard in order to do exactly what you asked, to take the #2 place. that is all ETH has and it loses it, there is nothing left
2. XRP pump can not go on forever, the bubble will burst and it will lose its value eventually and comes down. nearly 40 billion coins supply is not a joke!
but it is impossible since:
1. XRP has released a ton of supply in the past. they will do it again soon and if they release even a 10 billion coins out of the remaining 62 billion (total is 100 billion and 38 is already released) the market cap of it shoots higher!
2. ETH is also pumped and in a bubble. it may burst and drop hard too. and it is always easier to pump a $1 shitcoin than pumping a $800 shitcoin.