When bitcoin inevitably crashes, inexperienced investors who believed the hype could lose everything. Bitcoin has no safety mechanisms. Typically, you'll get a private key or random words which protect your wallet. If you lose your key, your funds will be gone with it. There's no support to contact, no way to change the password, and no way you could verify your identity to get your account back. When it's gone - it's gone, there's nothing anyone can do. If the government decides to declare owning Bitcoin illegal, you may find yourself in trouble.