The maximum memory officially supported by ryzen 2700x is DDR4 2933 Mhz, does it represent any danger or would the life expectancy for the cpu shorten the memory?
Depends on your Motherboard's QVL RAM Memory list if it is supported or not.
as an example of compatible RAM Memory for this particular Gigabyte Motherboard with a 2700x CPU, it has 3200 Mhz RAM Memory that is compatible as per the Motherboard's QVL List: X470 AORUS ULTRA GAMING (rev. 1.0) | Motherboard - GIGABYTE Global - For AMD Pinnacle Ridge CPU
maybe I have expressed myself badly, nor do I refer to memory compatibility with the motherboards, I mean that the maximum memory supported by the 2700x according to AMD is 2933 and everything that happens over 2933 is overclocking.