I think small investment does make sense for new investor that are new on investment, investing huge amount of money without any experience is a very risky decision to make as he could have a high chance to lose large amount of his money due to bad decision made.
yes that is the good decision for new investors to make small investment first of all and after that when they gain some experience and skill about the investment site and gain some knowledge about the scam investment sites then after this they can invest large money and can do big investments which will proof very profitable for them.
First thing I want to make clear is that investments are not limited only to online world there are many good and genuine offline investments too so if you don't find legit place to make an online investment then you always have an choice to go for offline investments where the chances of getting scammed are very less and if investment is new to you then its always good to go with an small investment initially and you can increase your investment step by step as you gain more experience about it.