$BTC the elders say that cheap goods are often inferior, greed leads to loss, which is never wrong. This is something that we Vietnamese still hear every day, yet we still fall into that mistake because we cannot control our greed. Wanting to take someone else's house to make it a toilet for ourselves, who knew it would backfire. Just learning to control our emotions is enough. Knowing when to stop is key, and then you will never lose in your game. What's important is having a bit of knowledge too.