Of course 200 dollars is ok. You can always invest some more..
Trade smart and by the end of the next month you can earn double or even more, good luck!
Yes $200 is fine if someone will do it on a monthly basis and just to make it sure that you should buy it with bitcoin or if not you can try some other alt coins to expand your crypto investment. There are other coins to invest too but if you'll stick to bitcoin it's up to you.
Good for you if you can earn $200 per month, In bitcoin I can't says my monthly income because sometimes I have no job in signature campaign. However aside from signature campaign I also trade and my earning in this job was not fixed.
Invest in Top 3 most promising Coins in 2018:
1- Verify (CRED)
2- FLIXXO
3- ELIXIR (ELIX)
Yeah it is true, we can't says if that coin is the most promising this 2018. Because almost all coins in crypto currency are fall down so fast this 2018.