There are two schools of thought in determining the price of Tether.
By way of intrinsic value: This typically involves on-chain metrics, project metrics and financial metrics of Tether, collectively known as fundamental analysis. The law of supply and demand, tokenomics, use case, project roadmap as well as regulations and governance involved would affect the value of Tether from a long term perspective.
By way of price action: Primarily analyzed via candlestick chart patterns and technical indicators such as MACD, RSI and the bollinger bands, technical analysis forecasts the price of Tether on the basis that history tends to repeat itself. As the candlestick charts are a general representation of the emotion of the market, news announcements and community sentiment can be significant price action drivers for Tether as well.
Investors tend to prefer the long term nature of fundamental analysis, whereas short term traders tend to rely on technical analysis more. In reality, both analyses may combine and create interesting scenarios for Tether and the cryptocurrency market as a whole.

Tether achieved the all-time high of $1.32 in 2018-07-24, and is currently trading at $1.00.

In 2015-03-02, Tether reached the all-time low of $0.5725.

The current market cap of Tether is $118.36 B, as 118.36 B USDT USDT is trading at the price of $1.00.

There are currently 118.36 B USDT circulating in the market. These Tethers can be actively traded or used in the open market.

In total, there will be ∞ USDT. This includes the circulating supply, as well as those supply being locked or staked, and those yet to be mined, minted, created.

At the moment, the fully diluted market cap, also called the fully diluted value (FDV) of Tether is $112.49 B. The FDV is calculated taking the assumption that all supply of Tether is circulation, multiplied by its current price of $1.00.

With an algorithm automated identifying historical data trends, this Tether price prediction estimates and adjusts the forecast from time to time based on current market conditions. With such advanced machine learning, this prediction can be used to help investors in gauging the probability of the crypto market before making any investment decisions.

Tether has a good potential ROI as the volatility itself opportunities for multitude profits. Such volatility is a double-edged sword, and as such would be suitable for investors with high risk tolerance and healthy financial position. Therefore, it is important to remember that Tether and the crypto market as a whole is always subject to extreme market conditions, legal policies, social media stories, and other unpredictable factors. As such, it is advisable to exercise risk management and do your own research (DYOR) before investing in Tether.

You can buy Tether via Gate.io by following the steps on how to buy USDT once you have funded your account.