Good idea to pay back some loans if you can.
Man, this is harder than I thought! 30K, 50K, 100K, ... how I will resist the temptation to sell too much too early, I don't know.
Here is my suggestion - say to yourself - "it will take 10 years for the world to catch on to this Bitcoin thing, so I will hold my coins for 10 years before I sell any, otherwise I'm selling too early".
i.e. set a time target, not a price target.