RTX 3090 Best Use Cases

I have 20 Nvidia RTX 3090 GPUs that were previously set up for mining on NiceHash. Currently, they’re sitting idle but are powered by surplus solar energy, so electricity costs are effectively zero.

I’m looking for advice on the best use case for these GPUs. I’ve considered continuing with mining, renting out compute power on platforms like Lambda or Vast.ai, or even selling them second-hand.

What do you think is the most profitable or practical use for these GPUs today? Any experiences or insights would be greatly appreciated!