No, You Don't Have to Buy a Whole Bitcoin "How much is bitcoin?" "Around $14,000." "Well, that's too expensive. I can't afford that."   It's a conversation that has surely happened thousands of times over the past several months as a new swarm of people find themselves enchanted by the cryptocurrency space and its tremendous gains. And it reveals not only a misunderstanding, but also a psychological barrier that many face stepping into the scene for their first time. Since…