This is the seventh instalment of reporter Colin Harper's "Living on Bitcoin" experience in San Francisco. Find out what happened to him earlier on Day 1 , on Day 2 , on Day 3 , onDay 4, on Day 5 and on Day 6.I woke to the sound of thin but consistent rain against the sailboat. A gentle storm soon rolled in to softly rock the harbor’s rustbucket bedfellows, a few spurts of lightning distant and crackling across the bay.Dustin wasn’t up yet so I made a cup of coffee (gods be praised) and went above the deck of the Velela — the name Dustin’s sailboat came with when he bought it four years ago. The previous owner (a marine biologist) was inspired by the jellyfish of the same name, which can hoist a sail-like fin in the air to propel itself more quickly through the water.The Velela resting in the harbor.After Dustin got up (and we wolfed down some bacon-n-egg burritos), we made preparations, which included stuffing a rubber skiff into his Honda Fit, and we set out on the open water. The day was graying as we left the docking area, with a misting of rain so faint you could barely feel it on your skin.Once we’d motored out far enough, Dustin hoisted the sails. Swelling with the bay’s untamable winds, the sails vaulted us forward and pushed the boat to the right — a bit more than I would have liked.“This is safe, right? It’s not going to tip over?” I asked apprehensively.“I wouldn’t exactly call...
