Mark Cuban is known for a lot of different things. If you're a basketball fan, like me, you've probably known him as the owner of the NBA's Dallas Mavericks.

But this team has so much heart, so much determination.

If you love business, also like me, you've surely seen him on the show Shark Tank

where he's been striking deals and crushing dreams for 15 years.

Look we all make mistakes as entrepreneurs but I just really don't think you have your act together on this.

For those reasons, I'm out.

But now, he's taking a step back from the things he's been most known for.

This year will be his last season on Shark Tank,

and he just recently sold the majority stake in the Mavericks.

I wanted to ask him about these decisions.

So yesterday, Mark and I got on a video call.

Are you like in a spaceship? Just in a plane.

Ah, is this your private plane? My private plane, yep. Nice. It's a great place to do an interview.

It's a great place to do anything.

These days Mark, who turned 66 this year is giving more of his attention to a new arena,

health care, with a startup that sells cheap prescription medication online.

He says it has the potential to disrupt the industry.

It's actually, and this is going to sound crazy, it's been the easiest business I've ever had to grow.

Welcome to the Journal, our show about money, business, and power.

I'm Ryan Knutzen.

It's Tuesday, February 6th.

Coming up on the show, a conversation with billionaire investor Mark Cuban. Like some kind of pizza Ninja, Domino's are slicing their prices.

...