HODL works until it doesn't work and then you're screwed.
Exactly. Hodl'ing makes sense, sure. But for something like 100 years like the op is joking about, or even just a decade, it's impossible to know where bitcoin will end up. I don't think it's a good idea to hold until the end no matter what, especially if some altcoin comes out that improves on bitcoin. Blockchain technology will probably be here to stay, but bitcoin, everyone can be a little skeptical about. I think it'll be here for a while, but I just don't think it'll be a super long time.
Everyone has their own strategy holding is simply the strategy that gives more profits it has been proven time and time again in the stock market, of those that trade 80% are unable to beat the market and the rest is unable to do it consistently, so 99% of the traders cannot beat the market in the long run and for those that do there is a strong indication by the data they just got lucky.