WTF IS GOING ON???

Yesterday I had around 10 $ without touching in funding and everything was fine, and now I noticed that many coins are falling apart. I bought low quantities of $ETH , $BTC and other coins, and after a while EVERYTHING is dumping up to -35%. I've lost 4$ already (almost the half). What should I do now?

Note: I can't even open my assets now... Looks like I'll loss the few I had....