Yes trading bitcoin is profitable if you have knowledge and skills all cryptocurrencies follow so if you follow bitcoin you can make good profit from it .

First I am going to start this business with a small amount of money. If I can make a profit by trading then I will trade with more money later.
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100 % agree with you first you need to learn about the basic of cryptocurrencies and invest that much amount that you are happy to lose as beginner.
Bonus tip
You can use demo account to learn about cryptocurrencies without losing anything.