The supply of Bitcoin is fixed. Physical bitcoins are physical, metal coins with a Bitcoin private key embedded inside. Buying bitcoins with cash or cash deposit is the most private way to purchase bitcoins. Get yourself a Bitcoin wallet and control your own coins. Bank transfer is one of best ways to buy bitcoins in most countries. Lucky for you: It’s easy to find where to buy bitcoins online because there are so many options. If you want to store bitcoins, then a wallet is where you keep them.