Bitcoin will be the top dog for a while if not forever. To say that it will be at the top forever or has no chance of being over taken is a mere oversight. I say this because if you've been in this space long enough, you know that anything can happen at this point. Do I think Bitcoin should be in your portfolio, yes. I also think that you should spread your investing throughout the space. Although its hard to predict the real winners at the end of all this RED, with some sense of knowledge and common sense you should be able to figure out which ones make the most sense of it all. Real problems in society are being solved at this stage 10 years after inception after originally relying on the consensus that P2P tech is the only thing Bitcoin and Blockchain can resolve. When volatility slows down we will see the true colors of blockchain and what it is really here to accomplish.