I don't really have a strategy that I use. I just buy some Bitcoins every now and then when the price has gone down to hold for the long term. That's all I do at the moment. I am not even trading. It's purely holding what I do. I am so happy with my Bitcoin investment that I never look into any other investment. Bitcoin is more than enough for me as I believe in its full future potential.
Before i invest in to something, I try to study first the risk and potentiality of the investment, I also backtrack its value, how fast it move and how long would i wait to get a very promising return. I found bitcoin as a highly volatile investment, you can loose or gain in just a mater of hour. But if you are looking for good long term investment, you can consider bitcoin as one of it. Bitcoin's value suffers dips but it bounce back stronger and continue to get stronger each and every year.