Strategy can be shared if it has been profitable to you on multiple occasions. There's no point hiding it as you both can used same strategy and still come out successful. There's enough money to be made in the market that it'll go round. Hiding what you know will benefit your friends from your friends isn't ethnical or do you want your friends been a buddy on you forever?. Don't forgot it's more healthier when your cycle is financial free.

There's as big difference between crypto earning and strategy. Your earning shoudn't be exposed, don't disclosed does on purpose as you can become a target of different crimes just so your earnings can be stolen. It could be physical attack like kidnapping or digital, in forma of malware, hacks etc.