I personally think that Bitcoin will eventually be taken out by Ethereum, which will then give way to the likes of Cardano or something similar that will figure

I personally think that Bitcoin will eventually be taken out by Ethereum, which will then give way to the likes of Cardano or something similar that will figure out issues with scaling, sustainability, governance (ie civil resolution of conflicts and end of hard-forks) and interoperability with legacy financial systems (ie Banks). It's really quite amazing to follow the innovation in this space, once you get through all the shit coins and ICO scams that is.