Buying for lust is ridiculous and in the top 100 cryptocurrencies not all of them deserve to be voted on, so it's better to look at the top 20 just to be able to choose the best among the good ones and also every coin in that ranking is very safe in all countries
You are only narrowing the scope of the zone, if you have adequate finances as you wish, if finances are only $100-$500 you have to keep an eye on the top 100 on the top board so you can profit and minimize losses.
It only needs common sense. Why would you stretch your money too much on different types of coins when your money is too small? how many coins are you going to get if you insist on it? you are only going to pay more for the fees upon buying or selling them and I'm not sure if you can even sell them because selling does also have a minimum. Your money will only get stuck on the coins you bought.
For a limited fund, investing in 1 to 2 types of coins is already fine but if you have more, maybe 3 to 5 won't hurt that much. You don't need to grab each coin on the top 20 or top 100 because that is ridiculous. There is no guarantee that they will all pump once the market recovers.