When stocks are attractive, you buy them. Sure, they can go lower. I've bought stocks at $12 that went to $2, but then they later went to $30. You just don't know when you can catch the bottom.
禁止持有武器的法律。只会解除那些本来就不打算或没有决心要犯罪的人的武装……这样的法律只会让受害者变得更糟,让行凶者更强;它们相当于鼓励而不是阻止凶杀,因为一个没有武装的人更可能被一个武装的人袭击。