Mark Cuban Net Worth 2021: How Rich Is The Dallas Mavericks Owner and Dogecoin Supporter? Mark Cuban considers bitcoin as a better alternative to gold. Cuban is a billionaire investor well known for being in “Shark Tank." How Rich Is The Dallas Mavericks Owner and Dogecoin Supporter? Photo : Mitchell Leff/Getty Images Mark Cuban is a billionaire investor well known for being in "Shark Tank" and as the owner of the NBA team, Dallas Mavericks. He is also popular in the cryptocurrency community since he is a big proponent of crypto. Now, just how huge is Mark Cuban's net worth and how did he get so rich?