I feel for you there. I have a GTX680 and currently running 2 monitors from it. I waited for for the 20 series cards and when they arrived it was all about ray tracing I gave the entire generation a hard pass. When the 3080 was announced, I was all over it, only to discover that they were all taken by scalpers. Now I'm pretty much resigned to waiting another year for AM5 sockets and the next gen cards. Fingers crossed.
Lightning is still in beta. However this year a lot of big names are both adopting it and ploughing money into it, including some of the biggest exchanges and financial heavyweights. I watched an interview with Abby Johnson a few months where she brought it up as an area they are focusing on.
Bitcoin / it's network are very much like the internet 20+ years ago. There's so much more to come from this space.
There are always the exceptions. But mining Bitcoin is all about cost vs return. Your main costs are the ASICs and your electricity (to cool and power). In general you need cheap renewable / otherwise wasted power to be competitive, especially in Iran where your cooling costs are going to be exponentially more than Siberia!
And as price pulls back in the next bear cycle all those inefficient miners paying top-dollar for electric, using older inefficient ASICs and needing excessive cooling, will be wiped out. And the difficulty level will simply adjust.