It may not be the smartest financial move, but I don’t really have anything against people putting in a little bit of cash and going along for the ride.
I would NOT suggest making it part of your investment philosophy. But if you view it like a bet and throw a (very small) fraction of your income at it, go for it.
If someone is tight on cash and needs every bit to get by, stay away - the risk is too high. If you spend $100 in a weekend grabbing dinner or drinks with friends and can afford it, I don’t see any terrible reason against putting a few bucks in.