Investing in Bitcoin should not be expected to make immediate gains, but should be done for long-term goals. If you want to make profit from the investment temporarily, it can lead to losses. Those who knew about Bitcoin earlier are now regretting it. Because if they could have bought Bitcoin at that time, they could have made profit today but they could not maintain their mental strength at that time. There are also some who bought it but panicked due to a slight price correction and sold their Bitcoin. If you can invest in Bitcoin aggressively without wasting time according to your ability, then it will definitely be profitable. The price is not the concern but how much a holder has been able to save that is the fact.
Many people have this mindset that once they invest in Bitcoin this'll hit it big immediately and once they invest and nothing happened, they'll begin to feel bad because of their high hopes and lack of understanding of how this investment is, Bitcoin investment is for a long-term not for quick money.
There is no magic here, it is all about patience, continuity and consistency, for me I think Bitcoin was created to test individual level of patience and tolerance while making investment decisions, as for people that couldn't buy then, I think it was their mentality then, may they weren't able to take actions because how ignorant they are then, I think there's is still time for them now, they shouldn't regret much because no matter how they regret, they wouldn't reverse time so it better to face their fear and the future ahead by startng the needful for the avoidance continues regret,
There are people that sold their Bitcoin prematurely because of panic but i still see those people like baby bitcoiners because they aren't taking note of Bitcoin Bitcoin and what it become in the long-term.