I don’t think it’s a scam , but it’s a risky investment as compared to stocks, bonds and funds. But there is a drawback , since this does not have any tracking details it becomes a perfect way for the scammer to take your money without no trace and unfortunately we cannot stop the transaction since it does not involve any third party .
Basically Bitcoin has become one of the best assets over the last decade and it will give a huge returns in the coming years .