My father passed away and I'm thinking about taking all the money that was left for my sister because she's going to spend it on non-constructive shit.
That's so selfish and hurtful, why would you do something like that?
It's my way of repaying my dad.
If your sister is wasting her money, you could speak to her about it and educate her. Or you could leave it alone, as her finances are not really your business.
I just feel like taking the money and leaving my sister to figure it out.
I understand your concern for your sister, but stealing her inheritance is wrong and immoral. I think you should focus on your own money and lead by example and hopefully your good financial skills will rub off on her.