I’ve never lost any money to scams or thefts. Although many people want to do this, it’s not possible to buy bitcoin at Walmart with a credit card, debit card or any other form of payment. So if you max out your credit card to buy bitcoin, that could negatively impact your credit scores. Or, if you prefer, you can set up orders to buy and sell bitcoins when they hit a certain price. We do research on every exchange we list and are very careful not to include scam exchanges on our site. Bitcoin Blockchain is decentralized and the interactions are managed on the peer-to-peer level or individual basis in regards to mining.