Why Is This Exential Growth So Dangerous?

In the last 30 years, debt has grown at an average rate of eight per cent. We're currently around 70 trillion dollars - that's a growth of 500 trillion dollars over the next 24 years. If we continue our expedential debt growth until just the year two thousand forty four, so 24 years from now,. i don't see how it survives at this rate for another 20 years. It's truly inconceivable. And frankly, i just don't seeHow it's possible.