Sort:  

Unless a government or corporate body decide to support a new crypto, which is always possible. I think given enough traffic/marketing (or just straight power through financial backing or connections) anything can be overturned or assets such as oil/gold/etc. could be moved up/down the lists rather easily, given enough effort. What are the chances of such an event taking place? Very slim. But let's say a future corrupt state decides to fund their own coin or support something that helps with their business, and other corrupt nearby states also jump on the train.. boom, BTC is knocked down a place. It'd have to be GIANT momentum, but it's certainly not impossible for it to be moved down (at least for a temporary bit).

Of course nothing is impossible in this regard.