I don't know about that line of thinking. The first knife my dad gave me was something of a family heirloom. Not necessarily in the sense of $ but it certainly had sentimental value. My dad got it as a present himself when he was about 10 from his aunt who travelled in Scandinavia at the time. Just one more reason why I felt even more responsibility to look after it. I remember I nearly lost that knife one day and it seemed like the end of the world. Considering how a lot of adults tend to "misplace" their belongings I would say many kids are less likely to lose a pocket knife.