When will this madness end?
Who is willing to pay such amounts for a transaction?

Look at coinmarketcap, all coins bleed.
I think the increase in gas prices is caused by panic sellers, people see the price of bitcoin and other altcoins have a very sharp decline, people are racing to quickly sell their tokens on uniswap, the bigger the gas price the faster transactions are processed. I am sure this will not last long, tomorrow or the day after tomorrow the gas will return to normal as before.