I am studying the Law of large numbers for independent and identically distributed (i.i.d) random variables.

Assume there are i.i.d variables $(\xi_k)_{k\ge 1}$ taking values in $(0,1)$. From the law of large numbers, we know $\frac{\sum_{k\le n} \xi_k}{n} \to \mathbb{E}(\xi_1)$ almost surely (a.s.).

Then we know, if $\mathbb{E}(\log\xi_1^{-1})<\infty$:

$$\sup_{n}\sum_{k\le n} \xi_1\cdot \xi_2....\xi_k=\sup_{n}\sum_{k\le n} e^{-(\log\xi_1^{-1} + \log \xi_2^{-1}+....+\log \xi_k^{-1})}\precsim\sup_n\sum_{k\le n}e^{-i\mathbb{E}(\log\xi_1^{-1})} < \infty$$ a.s. (geometric series).

Let's consider $\sup_{n}\sum_{k\le n} \xi_n\cdot \xi_{n-1}....\xi_k$.

Can we prove this is also finite?