Wasted or wasteful is the act that is forbidden by Allah SWT, because the wasteful person is his brother Satan, like the word of God in Al-Quran letter of AL-Isro 'verses 26-27 namely:
وَآَتِ ذَا الْقُرْبَى حَقَّهُ وَالْمِسْكِينَ وَابْنَ السَّبِيلِ وَلَا تُبَذِّرْ تَبْذِيرًا (26
إِنَّ الْمُبَذِّرِينَ كَانُوا إِخْوَانَ الشَّيَاطِينِ وَكَانَ الشَّيْطَانُ لِرَبِّهِ كَفُورًا (27
From the above paragraph can we take the conclusion that, do not we wasteful because wasteful is his brother devil.semoga useful especially for myself and for all friends.