Zero.. I recently owned 10 but sold them all when the price jumped to $200. I guess I was too quick on the trigger, but what can you do. Will be buying again in about a month when this hype cycle dies off.
One potential solution to your problem is to do something like: sell Y% of my coins everytime the price increases by X%. An example would be sell 20% after each 50% rise (semi bullish plan. I also made those numbers up, don't consider them as specific advice).