You avoid scammers by first understanding that there is no free money anywhere in the world.
You also avoid scammers by not trying to double your money within the next 24hrs.
You will also avoid scammers by not clicking random links.
You also avoid scammers by not sending your key phrase to anyone.
You can avoid scammers by not trusting random internet users.
You can avoid scammers by not involving in what you know nothing about.