While holding blindly is not the best strategy it is way better than trading blindly
That remains to be seen, actually. When you trade blindly, you will very soon notice that you do something wrong, you won't have to wait like a couple of years before you come to understand that your strategy simply doesn't work. You just shouldn't be blind yourself. But if you are, then no strategy will bring you profit, neither trading nor holding. In this way, it is really hard to say decisively and conclusively which approach is better and which is worse. Personally, I think that trading is a faster way to see if you are doing something wrong and then make changes to your investment decisions.
Trading also is a faster way to lose all of your investment in it. Is there a way to know what exactly you did wrong and to trade successfully after that? I don't think so. These two strategies, trading and holding, are almost the same in respect of expected profits/losses, but imo trading is more risky if you are not a very good expert in the field. But you don't have to be an expert to hold BTC while waiting until Bitcoin development team, who are good experts indeed, will make Bitcoin working better, which will make it more popular, which will increase the demand, which in turn will contribute to the price rising.