50's a lot.
Around 5-10 altcoins will do. I have that number and not so much with those because I have invested mostly my money with bitcoin and ethereum. And the other altcoins aren't so popular but it's not heavily invested, it's like an alt that I just wanted to have and hopes something good but I'm okay if nothing goes well with those alts too.
I'm afraid that it's true

). Only few altcoins out there are worth to invest in while there are thousands altcoins to invest in. It's also the reason why it's not easy to earn money in crypto world cause everyone can easily fall into a terrible altcoin and lose their money if they don't have any experience but still wanna earn money in this world

And thinking of investing with 50 altcoins, seriously it's totally a lot.
Your portfolio has used diversification that much. It is good to diversify but you need to look for the good coins to expand your money not with just called you are doing the deed. You need to be more oriented of the coins that can potentially give you returns, not just to make you look like a real crypto enthusiasts.