Emotion often defies logic when it comes to trading (this is where confidence comes in). In regards to Tether USDT, it is a cryptocurrency pegged to the U.S. dollar. This means that 1 USDT = 1 USD at all times. In reality it's more like 1.03 USDT = 1 USD but you get the idea. What this allows is if BTC for example is at $4000 USD, you can trade it for $4000 USDT. The next week, BTC drops to $3200 USD. You now use your $4000 USDT to buy BTC at the lower price. The advantage here is your $4000 USDT doesn't go all over the place in value because it is a pegged currency. I'll go into more detail about the pros and cons of USDT and other hedges in a future post. Hope that helps :)

P.S. Check out my first post...it's my cat :D