I am of the opinion that you keep your laptop and use it for learning of other IT skills which could help you in time to come or in the future. This should be alright for you to take.
Hope OP has a goal not just buying and buying, and I love the strategy the young man is using to accumulate his bitcoin is it that he is using all the 100 dollars to purchase bitcoin or is he taking out of the 100 dollars because out of the 100 dollars he will eat and maybe get something, that is what have been thinking is not as if selling the computer will bring him more money he will even sell less so I also agree for him to keep his computer, and focus on other means of getting money either get a job because relying on the allowance alone is not enough for a serious trader.
I say you save it for now, find a good job to pay for your expenses, and learn a craft that would pay in crypto, website development being one of those things. Soon as you’re able to do that. Get certified, earn in crypto, and you’d be thanking everyone in this forum one day when you get your first crypto paycheck.
I agree too, a laptop is a very important device, and buying it back will be more expensive, it is only gambling addicts who sell their assets to gamble I don't think people who want to invest in Bitcoin will do that, not sure, and learning a craft will help and getting a job will even relief you of so many things, even the biggest guys in crypto did not sell their kinds of stuff to invest in bitcoin so all you can do is to plan out how you want your life to be and it will work according to the way it was planned if you determine to achieve your goal don't give up.