People should not just buy small amounts of Bitcoin to try to acquire more bitcoins in the future.... you should make the Bitcoin price work for you. I also started out by buying bitcoins on a weekly basis.. but I felt that was the wrong strategy. (You say you can only buy every other month.... and that is forcing you to buy at any price.... )

The best thing to do is to hoard your money and then to wait for the Bitcoin price to go low.... then use all that money to buy at a low price and then when the price goes up... you sell those coins for a small profit and hoard the profit... until the price drop again.... then you buy again. (Just watch the fees ... and only do this if you made a good profit... that are way more than your fees)