If you are using WPA2 encryption the only practical way to break the password is to keep trying guesses until you get it - If you use something relatively long and random rather than dictionary words then it would take literally years to be able to crack it which nobody is going to bother doing. See the attached screenshot - With that randomly generated, 15 character password, the tool at
https://www.grc.com/haystack.htm says that it would take "1.49 million centuries" to randomly guess it - So yeah, basically not going to happen! Cracking of WiFi passwords like this simply doesn't happen in the real world.
You also have to bear in mind how far your WiFi network reaches the only people who would be close enough to crack it would be your immediate neighbours or someone sitting outside.
In short, use a decent random password with WPA2 security - You'll have nothing to worry about.
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