Following this question:https://mathoverflow.net/questions/436036/can-we-find-such-k-so-that-the-following-inequality-holds/436040#436040.

Consider a sequence of independent $n-$dimensional random vectors $u, v_1, v_2,\dots, v_k$. Define $X_i=\sqrt{n}(u\cdot v_i)$ for $i=1,\dots, k$. Note that by central limit theorem, we have $X_i\to N(0,1)$ as $n\to \infty$ for $i=1,\dots, k$. Can we still prove this similarly inequality?

>Fix $\epsilon\in (0,1)$, can prove that for any $\delta>0$ there exists $1\le k=k(\epsilon, \delta)$ (some number) so that
$$ 
P\left(\frac{X_1^2+X_2^2+\dots+X_k^2}{X_1^2}>\frac{1}{\epsilon^2}\right)>1- \delta ?
$$