The only thing I'm counting on is a post riot made about 6 months ago, stating that they are re-working prestige skins and gem stones and youll be able to aquire a prestige skin over a long period of time without having to buy it. I think they called it the "mythic overhaul". I tried to message lol support about it but they they said that "they cannot talk about speculation or upcoming games". Here is the post I'm talking about
Overall, I haven't lost faith yet (ik there's a chance to reroll) so yeah! Hope this helps!