I think I would keep 80% of my stake. With the remaining 20%, I would buy some things I need for work. Simple. Buying and selling exchanges have to continue for the market to be liquid. But since I really like this Blockchain and see its potential, I think a way to add value is to stay in it and contribute. I wouldn't contribute anything if I withdrew thinking I could start over from scratch. Plus, I can't undo the foundations of the building I want to end up having. A skyscraper.