It seems to me that it is optimal to start investing with 3000 thousand dollars. But I started with $ 200))
The amount of money in this market is not so important but it is important that you have enough knowledge to be successful in this market or not. Many people have been very successful in this market with very small investments. I also advise new investors to enter this market should not invest too much at the beginning because you need a lot of experience to be able to succeed in this financial market.
Investing huge amount of money is not the most important thing but understanding the falling and rising of the market is very important. So gathering experience gradually with small amount is supported and advised. $200 is a good start if invested in a worthy coin will grow rapidly.