i’m in a similar position….
i’ve about 60k€ sitting in a portfolio. i’ve had it for years and have only used it once and that was when i was 20 to buy a scrapper when i went self-employed. i’ve not touched it since. for me the money is not there, but it is a nice safety net should things go tits up and it does mean that i can retire earlier than i could without it.
if i were to come upon 30k i’d put into shares/investments, perhaps with the view to buying a plot of land and building a small house in a few years time.
i’m fortunate enough to earn enough that i don’t need to borrow, do not to have any debts (partly thanks to my old man’s mentality of only-buy-it-if-you-need/want-it-and-have-the-money-to-buy-it) and do not lust after shiney things or fast cars.