If you really want to invest on bitcoin, first of all you must need to know that investing on it means you'll need a capital or a money in order to invest of it. If you're capable of investing an amount of money into Bitcoin, it would be better if you'll buy if the price is low. This is a usual strategy just so you know. You'll buy during the dumps and will hold it for a period of time until its price, again, increase. Bitcoin's market value increases from time to time, and investing to it means your profit will also too.