You can sell some Bitcoins and spend it on whatever you want. But you need to think about covering your daily needs so you will not have a problem. You should keep some Bitcoin for the future because Bitcoin have the opportunity to reach another high price.

We are not yet at peak Bitcoin, not yet. So you can still hodl it and wait for the time to come. You can enjoy your profit by selling Bitcoin and you don't need to think about your siblings. That is your Bitcoin where you can sell or hodl without their permission.

That will not be good if you spend all on hookers. It is better if you prepare your future and think about what you want to do with the profit from Bitcoin. Allocating the profit to other things that can produce money will be the best way for you.