I think long term trends can really follow some pattern (like parabolic trend)... but anything else is more or less random. in hindsight however you can always draw some nice support lines. but there are always at least a couple of possible lines...
I would have a look at DAI which is a token on ethereum (as USDT too). It is pegged to the Dollar in the form of a complex contract. It is backed by Ether as a collateral. I currently hold a bit of USDT and DAI to spread risk. The main risk of DAI is that it is new and has to prove it being stable in market crashes yet.