Is said $100 allowance or your dad just gives it to you in addition to another source every month?
I believe it's the monthly allowance provided by a parent to their child who isn't yet working. After completing high school, the typical path leads to university. This means that the $100 covers their food and leisure expenses for one month, usually excluding tuition costs. CMIIW.
I agree with your statement that when buying Bitcoin, one should not expect substantial profits in the short term. Remember that everyone needs a considerable amount of time to reap profits because the process is not easy. Learning about crypto while practicing DCA is the best approach until OP can stand on your own and expand your crypto portfolio with earnings from your job. At least, with more funds, OP have clear goals and a basic knowledge of Bitcoin investment. This way, the journey with Bitcoin can become more seasoned and experienced.
I also think so, $100 was given by his father for his additional needs apart from necessities such as food or other basic expenses.
I think $100 is free money that you can use as you like without any other more important needs.
And indeed in investing in Bitcoin there are many things that need to be learned, especially being able to get rid of greedy thinking in order to get big profits, but I think the first step taken by the OP who wants to invest with money that is not used for other purposes is quite profitable. great to be able to control many things in the future.
We will never know for a long time or not, but in investing what is most needed is the process, if people have gone through the process then I am sure it will not betray the results.