  The Cauchy problem in $\mathbb R^n$ is considered for \begin{eqnarray*}
\left\{ \begin{array}{l}
  u_t = \Delta u - \nabla \cdot (u\nabla v),\\ 0 = \Delta v + u. \end{array}
\right. \end{eqnarray*} For each $n\ge 10$, a statement on stability and
attractiveness of the singular steady state given by \[
u_\star(x):=\frac{2(n-2)}{|x|^2},\qquad x\in\mathbb R^n\setminus\{0\}, \] is
derived within classes of nonnegative radial solutions emanating from initial
data less concentrated than $u_\star$. In particular, for any such $n$ it is
shown that infinite-time blow-up occurs for all radial initial data which are
less concentrated than $u_\star$ and satisfy \[ u_0(x) \ge \frac{2(n-2)}{|x|^2}
- \frac{C}{|x|^{2+\theta}}\qquad \mbox{for all } x\in \mathbb R^n\setminus
B_1(0) \] with some $C>0$ and some $\theta>\frac{n-2+\sqrt{(n-2)(n-10)}}{2}$.
  This is complemented by a result which, in the case when $3\le n \le 9$,
asserts instability of $u_\star$ as well as the existence of a bounded
absorbing set for all radial trajectories initially less concentrated than
$u_\star$.
  In particular, previous knowledge on stability properties of $u_\star$, as
having been gained for $n\ge 11$ in [24], is thereby extended to any dimension
$n\ge 3$.
