I think there are still a few more years left. I agree that the high fees make BTC unusable for everyday spending. However, as a store of value, it does not need to transact often. Currently, high fees are only a problem for traders. Hodlers don't pay fees for holding.
ETH has had days of high gas prices as well. I think it is less of an alternative than, for example, Dash.
We may have to have two tiers of coins for exchange. Bitcoin could be for large amounts of money while another, faster and low or no-fee coin could be used for every day spending. I had hoped litecoin would fill the need. However, it doesn't seem to be doing much of anything these days.
ETH really is good as a programmable blockchain. However, as for a currency, I think the ERC-20 tokens on it do a better job, like USDC, USDT, TUSD, and BAT.
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BTC is not a store of value. It has zero use cases. If I'm going to buy something online, I'm not going to use BTC. If I want to tip somebody, I'm not going to use BTC. What am I going to use it for? Nothing. Literally nothing.
The point is BTC miners don't want to mine BTC because it's not worth their time after the halvening because of how halvening works. So not only you already can't do anything with it, it'll take even longer to transact over time.
At least you can make teeth, jewelry and (most importantly) industrially critical technological parts using gold, so it is a store of value. But you can't use BTC for anything.