The different future should also happen because while GOLD token is backed by gold, USDT is backed by a pile of lies, hence I expect GOLD token continue to rise driven by gold's scarcity and governments' printing spree, while I expect USDT fail someday (of course, there are plenty of other USD-based stable coins to take its place).
I also see USDT (or GUSD or others) and GOLD as different categories. USDT is for every day quick transfer of funds and GOLD is for long term safe investment. Hence imho they are not so much in competition.
Scarcity, yes, it is what I meant above. Human can not print or mint physical gold. Gold resources on the Earth are finite and it depends on how human mining technologies will grow in the future to mine all physical on the planet. No matter how advanced the technologies will be, resources are limited, not infinite.
Not only printing can and will depreciate USDT in the future, in my opinion, but the biggest threat is in the missing money from Tether bank accounts, to really back it up 1:1 with the USD.
If there will be a black swan event, something happens and people will start to exchange their USDT to USD or any other coins/tokens/FIAT and withdraw from exchanges, we will see a massive price decline for this "stablecoin" because there is just not enough FIAT money in the bank to fulfill all their promises that every 1USDT is backed by 1USD.
https://coinmarketcap.com/currencies/tether/The price chart shows Tether USD is almost stable compare to USD, recent 2 years Tether USD price has fluctuated in the range about +/- 3% compares to USD. Unfortunately, it does not take into account the inflation of USD in reality. Physical USD does not have scarcity as physical gold has. The US government can print as many USD as they wanted for. The pandemic proves that fact, fortunately.
Real gold, as we know likes to be the safe heaven in such breaking moments on the market, even better it tends to keep rising in price and add more value for investors. That is why the GOLD token is such a great stablecoin. Not only is tied to the real gold price, which likes to go up when there is the market bleeding, but also it's not so volatile and there is less probability that the price will collapse when people start to withdraw their funds because they are fully backed with real gold in the vault. Everybody can check the audits and see this in real-time.
These are the main differences between GOLD token from Digital Gold and USDT from Tether in my opinion.
Gold will keep increasing in the future of course despite of rises and falls because of market changes. Its general trend will be upward. In gold, upwards we go.
The info is off topic but if you have not yet noticed, payments for your works in June was credited 16 hours ago.