Do you keep balancing your portfolio or let huge imbalances develop? Which is better?

I have the following strategy.

I identify all the potential investment opportunities I know of, which show long term promise. Long term because I don't have time to watch charts all day long. I read white papers, check out the communitie's engagements, look for key-people's track records, and think of the product/vision from the perspective of a possible future "client" or "user". I look at market caps, not in absolute terms but relative to each other. From these things I form an opinion on the potential of each.

Out of them I choose the ten best. I invest most in the project I believe has the greatest potential, and the least in the last one.

I watch some grow massively, and some decline slowly. Because I believe in all the projects I have invested in, I sell some of the profits and invest more in the ones that haven't taken off (read: bitshares). I keep balancing my portfolio like this. I don't realize losses, only profits.

What's the result

I have a nicely balanced portfolio (not big but balanced). In an bull market like this, I would have made many times more profit by holding coins like ETH. I sold them on the way up, and bought coins that keep going down. I still believe in those projects long term, so I don't worry too much.

I don't know how this strategy works in a bear market. Because I don't want to realize losses, I probably would have to invest more FIAT.

Is it better to let imbalances grow or even realize losses?

What's your strategy? Have you sold all the rest of your bitshares and NXT and jumped into the latest bandwagons? Are you buying eth now, or are you exited about the low prices of Bitshares? Do you try to balance to minimize risk? Has your strategy worked? Do you have different strategies for bull and bear markets?