How to Scale to $1M Revenue on Amazon? Stuck at 3-4 Sales/Week

I’ve been selling an eGPU for around £200 (sometimes discounted) on Amazon and consistently get 3-4 sales per week. I’ve tried other products, buying wholesale from China, but nothing else really moves—only this eGPU has steady demand.

I want to scale up and eventually hit $1M in revenue. Short-term, my goal is to reach $10K/month in revenue within 6 months. Should I double down on this eGPU and expand variations, or should I diversify into non-tech products?

If you were in my shoes, what would you do to reach that $10K/month goal 6 months from now? Any insights from experienced sellers would be hugely appreciated!