I just sold Substratum too for a tidy profit. I’m sure I’ll regret selling it someday, but that’s trading! I actually took a relatively large position in Quantstamp. I got in a little bit too late, just before it corrected, counting on it having a second rally. Great project, I love that they offer a unique product, no real direct competitors that I’m aware of. Seems to have found a strong support line around .00001700 BTC. I can’t give investment advice but if I was going to buy this would be the time, or you could wait for confirmation of an uptrend. I do get a little nervous when BTC is on such a tear, it sometimes sucks momentum out of the altcoin market. Good luck!