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.