Why not just post it here so we don't have to trust your link you posted and can give you honest feedback?
Medium might have a better readability. But you are right, I just edited and posted it here
Wanted to put all my money in Bitcoin and Ethereum, now I am thinking twice. 
But actually how's the index performing this year.
But actually how's the index performing this year.
It's still safe to put the majority of your investment into stable coins like Bitcoin and Ethereum, but having a small exposure to other altcoins can better mitigate the price volatility.
As mentioned in the article, the index rose up over 500% this year