People who invest in small capital do not actually have a great risk of losing, but they can not benefit greatly. Usually people who invest in small quantities also have a longer time and patience to achieve the target profit.
I think investing in small capital and big capital is no further difference. Challenges that small capital may encounter is the same with investment with huge amount. The most important thing that you need to consider before investing is the project that you want to invest. Make sure that you invested in legit and authentic projects. Losing small amount is still the same when you lose big. Money is never been easy to find so you need to be more vigilant and investigate before you go for investing. I think the main challenge fr small investment will be when you invest small amounts you will just get small profits too. But when you invest huge amounts you will also receive big profits.