Stuck On 10.13.6 Because Of Incompatible GPU -- Have No Money To Buy A New One -- Is It Safe To Keep Using High Sierra For Now?

Unfortunately I have a GeForce GTX 1060, so can't run anything beyond 10.13.6.

Although my PC would run Monterey just fine If I had the right GPU.

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I like macOS and want to keep using it, even though it's an outdated release, I'm able to sync my iPhone just fine on it and all the apps I need run without any modification.

I don't have any money to get a newer, decent GPU for now.

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Is it ok to keep High Sierra at least for a few more months?

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My HW:

i5-9400F

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GTX 1060 3GB

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24GB DDR4 RAM

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500GB NVMe SSD.

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macOS 10.13.6 17G14042 with latest kexts and OpenCore 0.7.3.