gold digital makes it teleportable (weightless, massless) and trivially divisible. In other words, digital gold solves the problem of using gold directly as a medium of exchange.
Bitcoin wasn't ever supposed to be a decision about being "gold or cash." Bitcoin was always supposed to be gold and cash. That's what makes it disruptive! Making onchain transactions
slow and expensive has the effect of turning Bitcoin back into gold 1.0. Slow and expensive is the BTC strategy. A digital version of gold that isnt cheap and fast to move is no better
than real gold as a medium of exchange. And let's not miss the fact that being able to use the gold directly as a medium of exchange without needing a bank to route it for you