Spending money on useless stuff?

Hello .. Back here, today's topic is on 'spending money on useless stuffs?' what it mean ? Haha , i am here to tell you guys .. Okay,firstly I saw boys spenting their parents hard earned money on vanguard nowadays.. My friend(boy) recently spent his birthday money buying a box of vanguard .. Haizzz.. I kept on nagging at him .. Yeah I treat him as my younger brother ... But refused to listen .. We should spend money on the things we  'need' instead of we 'want'. Yeah .. I did it before like the boys ..  In p5 , I used all my saving buying alot 'squishys' .. Now i left alot, useless to me already dun need it .. Regretted to buy so many at first .. Should spent the money on the things,i need .. So i wanted to tell you guys to 'save money and spent smartly.'