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.
Enough for what? To become a billionaire? Hardly. But you can still earn a neat amount of money if you'll hodl for long enough. Of course, you can afford to invest (much) bigger amount if you'll find a part time job. Just some basic side hustle, perhaps something you can do online.
If the trend of the Bitcoin cycle continues, $100 a month for Bitcoin investment will be enough to make a very good profit in the future. If @OP is willing to be consistent for 3-4 Bitcoin cycles (4 year bitcoin cycles), I think @OP will be getting a huge profit from this investment.
@OP is still young so there is many years ahead of him and if he can consistently execute his plan monthly for 12 years... I can't imagine how much this guy will be gaining assuming that Bitcoin 4 year cycle never failed. So I highly agree with what LFC_Bitcoin stated.
You’re obviously very young so have plenty of time. $100 a month isn’t going to make you rich any time soon but as part of a diversified portfolio, $100 a month for your working life will make you much wealthier than most of your peers.
$100 a month will set you up really nicely as a retirement pot. Bitcoin will likely outperform traditional stocks and bank savings accounts for the significant future.