If nobody will pay it then the fees will never rise that high.

Unless people stop making transactions, or the block size gets bigger, fees will go up. We'll all be fighting for the same, extremely limited block space.

When I refer to the fee amount here, I mean the amount of value in terms of buying actual goods and services. Like, a week's worth of groceries or 5kWh of electricitu. If bitcoin's value is going up in these terms, the fees in sats could go down, but the more popular bitcoin becomes, the more likely they will rise.

#Bitcoin's solution to this has been the lightning network. Most of the value will be locked up in lightning, but if you really need to, you can force close channels and pay what will likely be huge on-chain fees (at least by today's standards).