Stop answering calls from unknown callers,let them go to voice mail and i think that alone will allow you to screen out scams.
With apps that can copy someone's voice, it's true that you can check if they are scams but if the voice mail is kind of pressuring and you're the type of being paranoid, you might still fall for it. So, don't trust wholly is the main thing to avoid getting scammed.
In conclusion;
Remember,there are perhaps millions of human and maybe billions of electronic bots out there that are trying to steal from what you have worked-out your life to build,so is time to put in some effort to protect yourself and your assets against any potential attack.
For Bitcoin holders, use a hardware wallet.
For wallet apps, always use 2FA.
And much more important is to be yourself being informed with all of these scams, being knowledgeable and always verifying all sorts of financial transactions will keep you away from harm.