Honest answer, yes! I have been investing in cryptocurrencies since 2011 and I have never been a victim of scams*. For one very simple reason: before I invest, I look closely at the projects and do not believe promises made by others.
* This refers to projects in which I have invested money. However, especially in 2017 I have received some bounties that turned out to be scams afterwards. But here I have not lost money, but only a little time.
Wow, that's impressive, maybe I should give more time making research because I sometimes became a victim of scams. About bounties, yes, 2017 until early 2018 was the year where bounty hunting was really profitable, and just like yours, I also ended losing some of my rewards as they never recover after a long bear market, in fact until now they are just sitting in my wallet.