The internet needs a worldwide network of specialised computers to continue operating. I bet it won't be very useful anymore once we turn those off.

People use the Internet for a lot more than speculation.

What do people use BTC for other than speculation?

Buying drugs, money laundering, and ransomware

/s?

Gold only requires worldwide network of traders and physically secure holding places and general sense of security so it can change hands.

All that's required to to exchange gold is one person that has gold and another person who wants gold and has something the first wants to trade for it.

Really? Let's meet, I'll give you gold.

Or: for the majority of people, holding hold, recognizing gold, and exchanging gold is not possible. You need experts for that, and they all take commissions. And sometimes scam you.

You don't need experts; you can learn how to identify real gold yourself, in far, far less time than is required to learn to understand a cryptocurrency.