What you need to know on Wall Street today

Welcome to Finance Insider, Business Insider's summary of the top stories of the past 24 hours. Sign up here to get the best of Business Insider delivered direct to your inbox.

If you spend any time onTwitterand follow any media industry people, you'll often come away dizzy, and fairly certain that every media company is trying to buy every other media company.

It started a year ago whenAT&Tannounced it had reached an agreement to buyTime Warner. Then things really turned upside down when 21st Century Fox just three years after trying to buy Time Warner signaled it wanted to sell some assets toDisney.

Then on Thursday, it wasreported that Comcast might buy some of Fox. OrVerizonmight. And of course, President Trump might not allow AT&T to buy Time Warner. The FCC ispotentially loosening media ownershiprules.Net Neutralitymight go away.

Also in deal news, real estate M&A has eclipsed the record level set on the eve of the financial crisis — and it has to do with the retail apocalypse. Caesars is buying casino and horse racing company Centaur for $1.7 billion. Danish energy company just issued debt with a maturity date of 3017.

Credit Suisse just hired two top research analysts away from UBS, and it establishes a clear trend. Bitcoin trading shops are hiring Wall Streeters to build out the "next generation" of cryptocurrency trading. And Goldman Sachs wants to help improve your "financial wellness."

In markets news, a $423 billion investor explained why tech stocks are defying a warning sign. Walmart is making a mockery of the retail apocalypse — and traders are betting it'll keep soaring.

In D.C. news, while President Trump claims the tax bill would lead to a huge boost for business spending and hiring, executives aren't so sure. And the Republican tax bill contains a sneaky break for private jet owners.

unveiled its electric big-rig truck

Tesla just revealed its new Roadster, and it's a complete game-changer
The new Tesla Roadster can do 0-60 mph in less than 2 seconds — and that's just the base version
Elon Musk says Tesla made a new Roadster to be a "hardcore smackdown to gas-powered cars"
Tesla just unveiled its first electric semi — and it looks like a spaceship
Elon Musk just put the rail industry on notice
GOLDMAN SACHS: Tesla's new big rig won't solve its Model 3 problems
JB Hunt reserves "multiple" Tesla big rig

Lastly, Tiffany is selling everyday objects for eye-popping amounts of money — here are the craziest ones you can buy.