cost effectiveness is most important

I'm fujitaka.
Introduce what I have read and learned

Even a comedian with an annual income of 30,000 yen could make 100 million yen.How to increase money「年収3万円のお笑い芸人でも1億円つくれた　お金の増やし方5.0」


He is now YouTuber

Japanese-business-book,