There are only 2 ways to make Bitcoin scalable and fungible:

1. You upgrade Bitcoin with the best tech out there, accept the tradeoffs

2. You use other networks that tokenize bitcoin, such as Beam/DarkFi/Zano. You get the features for BTC, but don’t use the Bitcoin network

But a popular number 3 is:

You pretend that the problems don’t exist, Bitcoin is already perfect and it’s the fault of users for wanting to use Bitcoin or having greater expectations from it