Because the low cap coin could potentially have a lot of room to grow. But the risk is also huge.

While it is true that without risk there is no reward, I would be very careful. Even great projects can sink down in the current situation on the crypto market.

I haven't heard of the 5 projects you list in the OP before. Investment wise they are all below $10M marketcap, which gives them potential to grow. But ask yourself this, Will they manage to work their way up through the countless of other alts? What gives them an edge over the others, and most importantly will the market recognize it?