Can someone guess your seed?

Technically, yes. Practically, no. The maths is overwhelming. Even guessing a three-word seed would take 272 years at one guess per second. If a computer made 10,000 guesses per second, it could find a three-word seed in 10 days, but a four-word seed would take nearly 60 years. Now consider 12 words. At 10,000 guesses per second, it would still take 10 to the power of 27 years. That is longer than the age of the Earth, the Sun, and the observable universe combined. Even with every atom on Earth acting as a computer guessing a million times per second, the odds remain vanishingly small.

https://open.substack.com/pub/algorithm/p/can-someone-guess-your-bitcoin-seed