Use at least 0,5 BTC
1) Check the current BTC/usd price
2) Put a buying order about 2 dollars below current price for 0,02 BTC (i.e. if price is 280 $ put a buying order at 278$)
3) If you manage to buy, put a sell order at least 2$ above your buying price (if you bought at 278$ put a buying order at 280$). When sell order fills, go to step 2.
4) If price keeps raising and your buying order did not fill (wait some hours/days whatever), cancel your buying order and go to step 2.
5) If your buying order fills, but price keeps going down, wait some hours/days and go to step 2 again (i.e. Buy more).
I know it depends on the time you use for waits, and you are not getting the full benefit if BTC keeps going up and up. Earnings might be slow, but pretty safe in my opinion (disaster would be only if BTC goes very low and you are caught with lots of BTC, but you could still hold them).
Opinions?
Here's a simple and effective strategy that works - gains are small, but you will always gain in the long run:
1) Pick an asset mix that you are very comfortable with (as it's important to keep this fixed) - larger the mix, the smaller the gain - more stable your income;and
2) Rebalance.
That's it. Simple - when you reblance, you're always buying low and selling high - effectively removing emotion.