My answer is "no", I don't think gold is needed here. I could not find a poll response that was appropriate for me to choose. Crypto is not perfect and there would be much to gain from backing it with real assets, but I don't see gold as delivering a lot more value in a way that could help one of these businesses much.
First, gold bugs are mostly suspicious sorts. Average age is probably around 50. They don't even trust paper money or electronic money, so even though we trust crypto, it's a big stretch -- most of them won't. I know people here think there's a natural libertarian overlap, but I think converts are difficult to attain this way and that the overlap is therefore overblown -- you won't attract that many of them and the ones you do will cost you too much in terms of time/effort/money.
Second, storing/transporting/insuring gold is costly and it only makes sense if you have lots of volume. Until then, it's hard to buy/sell gold for anything near its spot price.
Third, maybe gold is as good as an asset gets, but it's still deeply flawed. Its price is heavily manipulated by big powers (isn't that one reason many people turned to crypto?). It's not as good of a store of value as it was in previous generations; a lot of younger people don't see it as so important as previous generations did. I still hold gold just as I hold crypto. I think (there's a good chance that) its value will stand the test of time. But I don't think it's a good basis for this kind of business.