The future is multi-chain.

Litecoin will always be around to try features that are too reckless for Bitcoin and to do fast payments.

Monero will always be around to offer privacy & experiment with avant-garde cryptography.

Ethereum (or something similar) will always be around to allow devs to build financial apps & create tokens.

It doesn’t matter that they don’t scale – they scale Bitcoin + provide features that Bitcoin doesn’t have. All of them can work as Bitcoin L2s – Ethereum already does with WBTC.

They also add monetary inflation, meaning that we won’t have everything divided by 21 million coins. But that’s the price we pay for rejecting true maximalism (one coin to rule them all, with all the features integrated in sidechains + layer 2s).