Yes, this is the best advice, only take the benefits, the profits that you get, and always operate with a balance that you are willing to lose, it is very Similar to when you play in a casino, you only have to risk the money that you are willing to lose, and nothing more.
To achieve that you have to have a good plan, a plan that follows the letter without breaking it, I think that is the biggest secret, but to get there you have to take it as it is, and follow your own rules.