>As far as scaling Bitcoin goes: prove it. It’s been a decade and it still does 4tps.
Sure. The Lightning Network already exists, is working and in use, and can in principle do essentially unlimited TPS.
Bitcoin doesn't need to scale to millions of TPS to be successful (since payments and microtransactions aren't its only use case), but it so happens that it can do that through second layer technologies.
That's exactly how the Bitcoin's payment layer scales. Visa is just one solution, but that's probably the most popular one. The settlement layer doesn't have to scale, because it's possible to scale the payment layer. You get all the benefits of sound money with the usability of fiat money.
Sure. The Lightning Network already exists, is working and in use, and can in principle do essentially unlimited TPS.
Bitcoin doesn't need to scale to millions of TPS to be successful (since payments and microtransactions aren't its only use case), but it so happens that it can do that through second layer technologies.