There are also decentralized options to protect you from volatility https://opyn.co/ or https://www.hegic.co/
There are many alternatives to Tether, for example USDc or a decentralized stable coin like DAI.
Having trouble believing that, especially as I can see evidence of hundreds of the damn things after a simple search - https://ico.tokens-economy.com/statistics/country.html?count...
Sure, many of those won't be using ethereum, but they still happened. And that's before you dive into the IEOs and STOs, which appear to be more of the same.
Even with the options on ethereum, Tether alternatives, etc. involvement with cryptocurrencies has high risk for someone who doesn't have a strong understanding of how it all works at a technical level, which is what the parent comment stated.
Seriously, crypto is one of the shadiest things you can get into. Avoid it, and any exchanges, like the plague. It's interesting tech, but nothing more than that. Hugely speculative and not worth wasting hard earned money over.
[1] https://www.coindesk.com/understanding-dao-hack-journalists