Dear John: You’re an a–.

You just dug your own virtual grave. You think bitcoin is a joke? Wake up, old man, the world has changed without you.

Ron Insana of CNBC just destroyed his reputation over his last bitcoin article and so did you.

The hate mail is just beginning. Good luck, old fool. N.N.

Dear N.N.: I’m mature enough to smell bulls–t. And bitcoin is bulls–t.

You are writing because bitcoin has fallen about 30 percent in value over the past week, mainly because China is cracking down on this phony “currency” and because JPMorgan Chase head Jamie Dimon called it a “fraud.” He said he’d fire anyone caught trading bitcoin.