You will waste a lot of money in comissions. No point to invest such a small amount in my opinion.
What has commission even gotten to do with this? Someone is looking to buy bitcoin to hold with the $200 and you are talking about commission. Really shaking my head for you right now.
Back to the OP, the truth is $200 is a good amount of cash to risk depending on how much the OP understands the volatility risk of bitcoin but looking at the fact that bitcoin is gaining ground and the value could skyrocket in the future, it is a really good amount to invest for the long term.
Thank you very much. I started aboard. I bought 2 ETH. That's all I've been through for 6 months