Pocket money, or the money that someone gives you will only bring you unrest mind if you plan to invest with such money, it's the type of money you are not ready to lose, because it's all you have, because you have no other money coming from else where.
I wonder how could this become an unrest of mind. Remember the money is already yours and you have all the right to spend it elsewhere. Aside from that, if this is an allowance, then it is a sure thing that you will be getting more in the future. I still believe as long as there is someone supporting us financially (being a student or under family care) it is always best to spend money to investments especially Bitcoin since we know sooner or later Bitcoin will increase in price which can give us profit in the future. As long as we are only investing the surplus of the allowance given to us, I do not think there will be such unrest as stated by @OP.
We should take advantage of living under the support of our parents since we don't have to worry about anything. It is the best time to buy and hold.