Yeah sell you stock to buy more Bitcoins because Bitcoin is the better investment of the two if you really want to make money.
You will have to be patient with Bitcoin but that does not matter because you are going to make money.
Yeah bitcoin is unpredictable and also the price of bitcoin is increase because its always depends in demand and supply.. block halving is coming and our supply will be decrease more and i think we are also increasing population using bitcoin so the price should be rise more price will come in the future and more people are using bitcoin..