I'm worried about fees going too high when Bitcoin gets mass adopted. (I don't need to explain, 1 block every 10 minutes)
I feel like people do not care about Bitcoin anymore. Most users, including myself, see it as an investment asset. I do not use Bitcoin daily to pay for things, nor can I even try. Most people are investing in Bitcoin to hold it for a short term or a long term. Investors are investing in Bitcoin ETFs instead of buying them on-chain. People are keeping their Bitcoin on centralized platforms knowing the risk.
If someone makes thousands of Dollars from an investment, they would happily spend a hundred dollars on transaction fees. But as an average user, I don't think I can afford a $10 transaction fee. I know some platforms accept lightning payment, but the number is too low.