Should I sell my BTC or wait till it goes up and why do you think it will go up?
You could invest some of your btc to earn more. Or you could just keep it and wait for the price to go up. And it will surely goes up because bitcoin now is becoming famous and more investors are after it. Bitcoin is the well-known cryptocurrency right now.
As the bitcoin price has dropped quite a lot recently., it might be a good time to buy some bitcoin now.
I have bought some bitcoins at the price just below the current levels. I think it will rise to 700 dollars soon.