I love the sentence "I just can't justify (to myself) wasting that much time on a problem I don't find interesting (even if it made me 10k/month recurring profi

I love the sentence "I just can't justify (to myself) wasting that much time on a problem I don't find interesting (even if it made me 10k/month recurring profit..." If you can't justify to yourself, how can you hope selling such an idea to someone? oh, maybe you are a commercial actor :D