There are about 15 different altcoins in my portfolio. 9 of them are in the top 40. The other 6 are located between the top 100 and the top 200.
That's a lot of altcoins you've got, I'd rather have 5 altcoins that has good community and has a better market cap than having a lot of it but having low quantity on my bag. Diversifying too much isn't also so good that it makes your investing power little to the proper coins that possibly can give you better returns in the future.
By January 2018, it was clear that having 2-4 altcoins would be enough.
That's not only by that time but you should apply that starting today and put higher portion to bitcoin.