you need to know if the bitcoin is unstable sometimes up sometimes down, to invest you have to choose a coin that has the potential like ethereum coins so you can get a profit in investing,
if talking about the price of bitcoin is likely to be absolutely exact price because of its recent price. It's good to buy bitcoin at its low price and wait for it to increase its price this way you will earn some money. For me, the ethereum is the best coin list because it has a long term and project. It has been proven by most of us that it's good to invest here