Choose 8 project and invest $50 each. If you like high risk investment choose your portfolio from under $10M market cap coins which are not pump&dump coins.
Do you have any examples?
Don't do that! Chances are 6 of the 8 projects will fail and one or two will succeed. I would suggest splitting it among 2-3 projects at the most.
$400 is not enough to split 8 ways and expect any kind of serious profit.