I do and no one has any right to stop me!
Certainly most people have the ABILITY to commit suicide, but that doesn't make it a right any more than the ability to commit murder makes it a right.
As for assisted suicide, you may have the ABILITY to help another person commit suicide, but this isn't a right either and you certainly don't have any right to have another person assist you in committing suicide.
And then we have euthanasia. What possibly makes you believe that you have the right to take another person's life based on their state of health? This is the thinking that ALWAYS leads to death panels.
The ability to make distinctions is one of the marks of the sane person.
I’m always struck by the Libertarian inability to make the crucial distinction between rights and power.