Here is what the main trading interface looks like:. Whenever funds are held by a third party, there is custodial risk — so choose your exchange wisely. Electrum is a good option for both beginners and advanced users. Malware is everywhere on the internet and regardless of your attention to detail, sooner or later you are likely to fall victim to some type of malicious software. Scalpers seek to profit from fleeting imbalances between buyers and sellers. Bitcoin addresses start with a 1 or 3 and look something like this :.