Bitcoin's price has swung sharply in recent months. Here's how to buy and store bitcoin as safely as possible.

Launched in 2009, bitcoin (BTC) is by far the largest cryptocurrency. Its market dominance is so significant that other cryptocurrencies are collectively known as “altcoins”—alternatives to bitcoin.

Grant Cardone is using bitcoin’s recent price slide to promote Cardone Capital’s hybrid model, which uses cash flow from rental properties to steadily buy more bitcoin on a regular basis. He contrasts ...