What was your overall BTC investment strategy? Did you dollar cost average to accumulate? Did you make some sell mistakes? Did you have some sell successes - especially since we had such an outrageous run that first went about 20x from $250 to $5k - and then another 4x from there - before coming back down.
I have a few people that I got into bitcoin - at least I was a kind of catalyst to their introduction and largely attempting to get them to accumulate and to HODL, yet peeps certainly have minds of their own (and I encourage that too), there were a few people who got some decent profits and got out, but only the rare one largely held through and was lucky enough to take decent profits in the $14k range - while still holding a vast majority of the original stash - I mean withdrew more than 4x of the original principle, and still retains "house money BTC" that is valued around 9x of the original principle. Surely some luck in that but such luck is surely facilitated when an asset (like bitcoin) has performed so well and really remains in a price territory that is more than 20x of its 2015 "stability" point (that was in the mid $200s for a vast majority of the year).
I started mining bitcoins at the end of 2013 and continued to do this for almost a year. But then I did not have large resources and I lost some bitcoins when my hard drive burned. I also took out a part of the money in dollars, but I saved part of the money in Bitcon. In the fall of 2014, I abandoned my work with Bitcoin. And I returned to this market only in 2016.
Also, the end of 2017 would not be very successful for me, I invested part of the money in various shitcoin and ico
Sometimes it takes some bad experiences and rough experiences in order to trigger various kinds of learning in the form of active participation, and sometimes there is luck too. Being involved and attempting to learn from experiences (both good and bad) does seem to increase chances that you will be in the right place at the right time in the future.
You know the old saying that luck equals the point in which preparation meets opportunity? Seems to me that some of your past experiences are going to help you in the preparation arena, so long as you continue to strive to learn not to be too greedy and continue to tweak your system(s) and strategies along the way.
Everywhere! 
