Having the capacity to satisfy a want or need, do you get to satisfy that want or need or you just post it forward?

I don't mind using a portion of my bitcoin to satisfy a need now so long as, its a pressing need and perhaps the last resort to fund the purchase of that need is me withdrawing a portion of my bitcoin portfolio.

All I need to determine is, is it really necessary for me to get a Tesla now or its more better to wait. Once I could satisfy answer this and its satisfactory, then its a green. Mind you, it agrees only with a portion and not all.