Well, I think that you can do both.
You’ve mentioned about diversifying your portfolio and I believe that you should put most of your investments into a safe and popular cryptocurrency whether that is bitcoin or ethereum and then you should also invest some of your money into new and upcoming projects.
Taking risks sometimes is not a bad thing
I don’t see how you can actually archive great success without taking some huge risk. Risk are actually life changing, it could either change the way in which you approach investments, either by being more cautious or could even discourage you from taking up investment in such field at all. One thing is for sure though, so long as you desire to invest anywhere, you’re sure to be met by some risky situations.
I wouldn’t advise that you take investments, especially one that requires you investing a large part of your portfolio in any other coin other than Bitcoin. ETH might have stood out but, it’s not as decentralized as Bitcoin and those with higher stakes could always flip the coin just as they would want to.