The common problem with most investors is that they put too much attention on the short-term rather than the long-term.
Setting your gaze on the long-term and having a disciplined investment often helps to ride out market fluctuations because the fluctuations only affects the short-term investors.
Having a longer timeline also leads to a much stronger position in the long run.
Most investors believe there's a best time to buy, but fail to understand that everytime is considered a best time, because even if one buys at a market top and then HODL over a longer period of time, it can help to average out the cost as well as increasing one's chances of profitability.
Through regular BUYING and HODLing for 4 years or more, one can take advantage of the DCA strategy and reduce the impact of the short-term fluctuations. It's also very important to reassess ones strategy overtime as this usually helps to make necessary adjustments in one's approach and to make more informed decisions about one's investments.
Although, Investing in Bitcoin, just like every other investments is associated with lots of risk and do not guarantee success but at least, it'll be safer to know that a well thought out approach, patience, self discipline and persistence can help one to increase their chances of achieving one's long-term goals.
Just as you've also pointed out, it's always better to focus and evaluate one's progress and make all the necessary adjustments in areas that's required, rather than comparing oneself to another person because it could actually turn out to be inexpedient and futile. Rather than comparing oneself to others, one could try making comparisons to their own previous positions as this could actually help to assess one's growth and also make all the necessary changes and adjustments for future growth.