You may say that Bitcoin has a limited supply. Only around 21 million bitcoins. But is it really true?
You may know that physical gold has a limited supply, but the banks use paper gold (electronic) backed by fiat or even backed by trust. You buy electronic gold (without physical delivery to your address) at the same price as physical gold, and you trust the corporation that if the price of gold increases, you will get paid. They can do the same with Bitcoin. More than 99% of gold exists in paper form or electronic form.
They can increase Bitcoin supply even to billions of Bitcoins.