Send Crypto to Receive More" (The Golden Rule): NEVER send cryptocurrency upfront to participate in a giveaway. Legitimate giveaways will never ask you to send them money, even a small amount for "verification" or "transaction fees." This is the most common and immediate sign of a scam.
* Too Good To Be True Promises: If an offer promises to double or triple your crypto, or guarantees exorbitant returns with no risk, it's almost certainly a scam.