Do what you love doing, even it means you spend something but gain you nothing. Not everything can be bought or compensated by money.
Strive to help people help themselves; empower other people, develop other people, especially those who can not repay you.
In the end, you may not gain anything or receive in return, not everyone will thank you, and your efforts won’t be remembered for long.
But, what matters most, you did what you love doing. and it made your life worthwhile.