If your capital is only $200 and you think that you have no other capital than this $200 that you will invest in Bitcoin, then you do not need to invest in Bitcoin.
I did not advise anyone to invest $200, I just used it as an example. Now you want to say that $200 cannot be invested? Or that he cannot invest? Everyone can invest according to his ability, there is no barrier here. If you want, you can also invest $10-20, it depends on the income of each person. So it should not be said that he does not need to invest.