Impossible to say as there is no general trading of ".li" names to know what the specific keyword would be worth.
"hardware.li" sold this year for $4k, but has no bearing on the prices in general as it's a one-off. Only 1 other sale this year for low $xxx, and last year "insurance.li" sold for just $225.
You need a very specific end user with a very specific goal in mind, and those are so rare it "generally speaking" makes the domain name almost worthless to keep renewing, manging in your portfolio, etc.
Personally I'd invest in more liquid names, or at least something with more chance of selling even with a long term wait, but again, with yours, who knows
Good luck