Yeah, I remember how SegWit dropped the transaction prices and I guess something similar will have to be created so that more transactions fits into one block. Then maybe the block reward payed only by a transaction fee will be enough.

I didn't think that fiat will be worth anything in 120 years. I just made an example how would that look today in fiat value. But I guess one of the solutions is layer2 for small transactions. I'd write "we will see" but I guess we won't. Maybe our kids will see