I receive about $100 a month from my dad. I am planning to use them to buy some bitcoin.
Please give me an advice to be successful Bitcoin investor in the future.
If $100 from your father is net money that you can invest, then you can buy Bitcoin gradually every month. But if it has to interfere with your other finances, meaning you will have other needs that might use that money, then you have to manage your finances first. It is important to know the appropriate amount that you can invest gradually. Just be consistent, if your ability is $30, then do it regularly every month, and you will see that your Bitcoin accumulation is quite good in the future.
It's difficult to give advice to the OP because he didn't specify whether the $100 was pocket money or money he used for monthly expenses. if that is all the money he has to use for his daily needs then he should not invest in bitcoin with that amount. but if it's pocket money, he can invest it in bitcoin instead of using it to spend on other useless things. but he needs to know one thing, bitcoin is a long-term investment, not an investment to get rich quickly, so he needs to have full knowledge before investing, don't invest with a get-rich-quick mindset.