It’s clear that a business idea is hot when companies that have nothing to do with the idea get involved.

It’s clear that the idea has turned into a mania when investors reward companies for doing this.

And that’s exactly the case these days with Bitcoin and all of its ancillary concepts, including the blockchain, the ledger on which virtual currency transactions are recorded.

As the value of Bitcoin has skyrocketed in recent months, companies previously focused on making fitness apparel, cigars and beverages, among other things, have rebranded themselves as virtual currency or blockchain companies of one sort or another. And investors have cheered them on, pushing their stock prices up.

Here’s a look at some of the rebranded companies and their explanations.

BEFORE

Long Island Iced Tea Corp.

AFTER

Long Blockchain Corp.

Long Island Iced Tea made iced teas in flavors including peach and lemon, as well as lemonades. On Thursday, the company, based in Farmingdale, N.Y., said it was shifting its corporate focus to the blockchain.