I do not advise anyone mostly the newbies to start big. You will never know how much you can lose as someone who's still testing the market.
It is best to test only with small amounts so you can formulate your strategy and you're going to have an idea how much you can earn and lose with your quick trades.
Rightly said! As a newbie trading with big capital they won't be exposed to the fact they can likely loose everything, and since it's a big capital there might not be cautios and keep repeating same mistakes due to the fact the capital is big they would just keep trying often and often not identifying the actual cause of thier lose, but a little makes a newbie more cautios and would likely learn about risk management quickly because he wouldn't want to blow up his account so soon.