High Roller
a wealthy person or company who spends their money in a risky way, often by making risky investments that can offer large rewards
often someone who gambles with large amounts of money
I would never invest money in their company. They are high rollers and I cannot afford that kind of risk.
If you are a high roller, casinos will often let you stay in their hotels for free in the hopes that you will lose big amounts of money.
If you go to Las Vegas the casinos offer massive luxuries and extras to the high rollers.