Something cannot appear or disappear by changing digits.
Except that's precisely how the money in your bank account works. The entire global economy is built on something appearing from nothing. Try again.
Wrong. The money in bank account is created out of loan contract and collateral. Watch the video.
You don't need collateral to have an overdraft. New fiat digits are always on hand to appear out of nowhere if they're needed. Any excuse will do. And it has become wholly reckless.
You can claim it's all based on the ownership of "debt certificates", but in the grand scheme of things, the system can't cope with the entire debt being paid back. If that happened, there wouldn't be enough "money" (read: debt) left in the economy for it to function. What's the sense in having ownership of a debt that can never be repaid without destroying the economy? Hence the need to create ever-increasing quantities of "money" (debt) from nothing. You can describe it a loan contract to make it appear as something rational, but it's still ridiculous in practice. If the average person had even the slightest idea about how the banking system really worked, they'd be far more skeptical of it.
Bitcoin solves this insanity. It proves beyond doubt that you don't need debt for an economy to function. Debt may have some advantages, but it has enough disadvantages that people would naturally want an alternative. And that's precisely what Bitcoin gives them, along with numerous other benefits like privacy and freedom. Call it "nothing" all you like. It's everything to some people.
You have two groups of people - those willing to borrow goods and services and those willing to lend goods and services. Fiat currencies are instruments that connect these two groups. Plain and simple. Eventual problems with these instruments have nothing to do with Bitcoin. Bitcoin is not lending your goods or services to miners - Bitcoin is giving your goods and services for digit alteration. So, given your logic, the solution for the problems that occur with instruments that enable borrowing and lending goods and services, is to give your goods and services for free. Are you serious or are you joking?