I know exactly the feeling. I buy more crypto and within the hour it drops in price significantly. It's the traders curse (purely subjective of course, since it's always 50/50 which way price will go). 

Big whales out there manipulate the price in fakeouts, as they're called. You see the price going one way and you jump in, but it is just a ruse to catch novices and then the price does a 180 degree, thus catching the lot of us.