I'm preparing for the college entrance exam to go to college, so I can't make money from working. I get about $100 of allowance from my father every month. I use all of them to buy bitcoin because I can use father's credit card for expenses such as food, clothes. I can buy Bitcoin on a satoshi basis every month, but when I see people buying Bitcoin basis on the internet, I feel like I'm too behind myself. Maybe they have a much higher income than me because they have a job. I think I can only invest $100 a month for the next year or two, would that be enough? I am worried about missing big bull market with halving and etf approval.
Investing 100 USD per month in Bitcoins as a student is totally fine and you shouldn't be giving yourself a hard time about it. Since you don't have any income yourself and fully rely on your parents to take care of you, it's already a lot to set aside 100 USD for investing. I assume that is the money you could be spending going out with friends during the weekend or go watch a movie, have a nice dinner, etc. So, cutting back on your personal expenses to start building a crypto portfolio is fine and should lead to some decent long term profit. Don't worry so much about missing out on the next bull run, because there will also be the next bear market around the corner which will send prices down again. Crypto markets always tend to move in cycles and you will find another good time to invest in. Focus on your studies and then you can buy much more cryptos once you graduate and have a well-paying job. Another thing could be to find a student job that gives you additional income without impacting your studies. That additional capital you could be using to buy more Bitcoins per month.