I personally think were just seeing a market correction. Yes I'm sure prices have been falling due to the lunar year, people being scare South Korea was going to shut down cryptocurrency trading in their country, and now the whole scam issue with tether. Any small or big bad news usually affects us due to were still in the early phases. Most people have heard about bitcoin, but majority of people don't know how to invest nor want to just yet. They are skeptical which I don't blame them. They heard rumors of people getting rich which brought some new investors and then heard about people losing their life saving which cause weak hands and the market to go down along when bad news were occurring. Best is to hold and buy the dips. Never invest any money you need and can't lose. As for tether if they can prove all their funds are back by a dollar they will be okay, but I feel it's too good to be true.