with the numbers of partnership ripple is partnering with banks all over the world is making me agree to the fact that XRP may over take BTC in marketcap. check the below giant partnership.
Ripple partnership with Western union.
Ripple Partnership with Moneygram
On 11th January 2018, Moneygram the renowned global cash remittance company joined the Ripple (XRP) bandwagon.
24th January 2018
On this day Ripple partnered with two more financial services in its tight race to establish itself as a crypto of choice for the establishment
30th January 2018
SBI holdings, a japanese based companies declared that its SBI virtual currency will use XRP as the only digital asset supported during its launch
7th February 2018
LianLian international, one of the leading chinese payment providers made a groundbreaking move to join RippleNet.
14th February 2018
Ripple and saudi arabian monetary authority embarked on a pilot program aimed as saudi banks.
And lot more to come stay tune.
Both BTC and XRP serve totally different purposes and I think this is highly unlikely to happen. First of all Ripple is centralized with banks and companies don't even have to use XRP "token" to do their business on the platform. Devs of ripple own majority of coins etc. where as bitcoin is free for everybody to run a node and participate in creating blocks etc.
Thing with ripple is that many take it as it's price is low to bitcoin and they don't think in terms of market cap or do their own research but they look at the surface "banks use it!" and buy cuz its dirty cheap per one coin.