i think you should join a signature campaign if you have no money at all. there you will be able to grow you bitcoin easily through a quality of posting. if you have money then you should buy bitocn and wait for the next higher rate.
Though you are right, but now a days signature campaign is not likely to be a method of growing. However, trading should be the best way. Because signature campaigns paid very little now, not enough even for a pocket money. Also ranking become.e also very high. Other methods like gambling, cloud mining etc. are also good.
