Interesting article, that's quite my strategy, I have studied some coins whitepapers though and will write an article about that, the fact you put a lot into the top 30 is realistic just statistically, you'll be more likely to have eggs in one basket that will burst, it's like gambling, you always have to keep a "cover bet" to cover your losses, and that "cover" is for me holding both Ethereum (because it is more complete than Bitcoin and has more room to grow fastly) and Bitcoin. Then I believe you still gotta study the top 30, it's good to trust probabilities law but there are coins in the top 30 that are just not worth putting anything into it, so diversify your portfolio of course, but not too much.