My tactic: keep buying small amounts of btc, this way you buy at low and high dollar/btc rates.
Eventually it will be worth much more.. my guess.
that's the sentiment most die hard bitcoin believers have. It's definitely paid off in the last few years for people with this mindset.
"die hard bitcoin believers" is a meaningless term in my opinion.
logically speaking you analyze bitcoin and see its potential, if you did then you start investing in it. but most people don't have a large sum of money lying around that they could dump into bitcoin! so they have to slowly buy bitcoin each week/month as they are left with a little bit of money after expenses. that means buying little by little and since you already know the long term potential buying at $3k then $4k then $10k isn't really a problem since you plan to hold long term and when it reaches something like $100k it wouldn't matter anyways.