I couldn’t really find a better thread for this, but the admins can move it elsewhere if needed.
The investment year has been very good for me in the big picture (ytd 22%), but the biggest “blunder” this year has been with Bittium. I don’t know if there are any kindred spirits here, but I personally sold my whole position in March 2025 and have had to watch this year-end rally from the sidelines. This hasn’t really bothered me at all during the year, but in these last few weeks, watching from the sidelines has started to get annoying, as this growth story seems to be hyped on every single channel I follow.
It is, of course, quite bold to say whether I would have had the patience not to sell these shares at, say, 15 euros (I sold at 9 euros) and keep the whole pot in my portfolio throughout the year. Granted, this rocket-like rise has happened within about 2 months.
Behind that sale is a very traditional textbook example of investment psychology. First buys in 2020 and additions in 2021. Along the way, the return was probably at -40% at some point, but in the big picture, I’ve always seen the company as having potential, but they have fallen short in realizing that potential. When this defense hype started, I already started rubbing my hands together, thinking “is the ketchup bottle finally opening?”. During 2024, it rose quite quickly to around 8-9 euros, but the rise largely stalled there for a while.
At this point, it’s also good to say that I don’t really understand Bittium’s business in depth, but the first half of 2024 and 2025 somehow made me fed up, thinking that this potential won’t materialize even now and that the rise was just due to the defense hype. So I decided to sell all the shares with about a 20% return, but the stock has risen about 350% since then, so I guess it’s only human to be annoyed on some level. What’s even funnier is that after my sale, the stock probably dropped to around 7 euros, and I already managed to think of myself as a genius and give myself a little pat on the back
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This didn’t bring much value to the discussion, but I thought I’d share one private investor’s story about how someone managed to screw up with this stock this year too. Congratulations to all current owners and Happy New Year! 
