Could I keep all of my inheritance all to myself?
What about your siblings?
I don't want my siblings to get any money from me
Ostensibly, that's hard to justify. Did your siblings do something to you?
My brother used my money for crack.
Well your brother should probably not receive all of your money with his crack addiction, you should still share with your siblings. Sometimes your family will make mistakes and it is wrong to not share with them.