Just take $100 and put $10 each in 10 of the lowest priced altcoins. It's like throwing darts. No one knows what one is going to pop next so spread your bets with a lot of small stakes where you can get a lot of coins for the money. And hey, it's only $100 .
You said invest on the lowest price altcoins. What about the coin you have invested are actually failed altcoins and never have any chance to go back again like scam coins. I'd rather to stick on most popular altcoin than trying my luck on those coins.
You could do this but why put small amounts in alot of coins when you could put larger amounts in maybe 2-4 coins? You want to have a lot of a coin when it goes 10x not pennies...but thats just me.
I agree you could be throwing darts and probably make ROI, the altcoin market is so different now then it was in 2014 2015. This bull market could really just be getting started, seems like everyday there is 10 billion or more flooding into these markets.
Don't narrow your interest in just the top 20 coins, there are hidden gems in the top 200 still. Broaden your investment range.