Well i also notice this and i believe that people who buy BTC on its early stage and hold it for long time has now millions imagine, how high the btc go up and those who buy on year that the price of btc is still low and sell on year 2017 or 2021 they surely got a very big return from thier investments, so buying btc and holding it for 10 to 20 years is a good idea, i believe that it will become profitable and it will become a good investment because btc is always rising, sometimes it will hoes down but it will come back with much higher price.
If you had known that since that year and at that time you had time to buy more Bitcoin, you would also be very rich by now. Because on average, those who bought Bitcoin in the year you said were also able to sell it back at around $70K, which was before the halving. However, it would also be a shame if those of you who know about this also don't buy more Bitcoin so you just become spectators when other people take more profits via Bitcoin this year before the halving occurs.
No one can time tell but if let say it's only possible, we wouldn't be wasting our time and money on something that is not really important than in BTC. It will look like we are poor for now because we allocate all or most of our money in BTC but this faith of ours can still change later on. I am not only sure if there will be some who will still get bored from waiting.
Those who remain as a spectator had some doubts left in BTC or maybe they still lack in budget. It can cause them regrets but maybe they will now get on board on the next trip. It's not too late anyways because there are also more people who are like them apart from those who have other reasons for not joining here. If we combined them all, maybe $1M is truly possible or we can be at least close to it.