Crypto itself isn't a scam, but its strengths also helps scammers thrive because a financial institution can't reverse malicious activity. This can be thought of as the same risk of loss as any investment. "If I convert to crypto, there's a non-zero chance my money could just disappear". This is (usually) necessary to take this risk into account when valuing crypto assets, so in a sense, scamming is part of crypto as long as crypto wants to be exchanged for fiat currency.