What is there to worry about? OpenRouter currently lists 13 alternate providers for V4 Pro, many of them in the US. https://openrouter.ai/deepseek/deepseek-v4-pro/providers

Unless you meant being concerned about hosted AI in general, not specifically DeepSeek. In which case yeah that's a huge concern to me but I can't reasonably afford a half million dollar appliance to self host a large model at reasonable performance and don't have anywhere to put one even if I could.