Let's not also forget that people that buy in lump sum always do it when there is Bitcoin price dip.
Your statement is not correct. People who invest with lump sum don't always invest during the DIP alone, they invest in bitcoin whenever they have the funds ready available. It all depends on the prevailing market conditions at the time the investor wants to make his purchase. Your statement can be misleading especially to newbies and visitors of the thread.
This part is correct.
If we follow others directly in the field of investment then we will never be satisfied with our investment because if one person is successful by investing in different strategy, I may not be successful by investing in the same strategy.
If two or more investor follow the same investment strategy and all of them observe the principle guiding the investment method correctly, they are all going to be successful with that investment. The only difference in their level of success will depend on the capital invested and maturity dates. These methods of investment has their guiding principles, these principles are there for anyone who follows it correctly to succeed. You will only fail to succeed from it if you don't follow the principles correctly.
This is weird since there are variations of success including the ways that individuals make their choices to tailor what they invest in and how they manage their cashflows in light of their own risk tolerance, so their level of aggressiveness after they had identified a good investment (such as bitcoin), there still can be levels of aggressiveness or whimpiness within correct applications, and outcomes might be different, even though each person might be able to claim success within his own parameters of how much and how he was willing to apply similar strategies and to purposefully come to different balances when his financial circumstances might have had been very similar to another person who might have had been more whimpy or might have been more aggressive than the person with comparable starting financial circumstances.
Mere financial success might not be exactly an appropriate comparison of which version is more successful if each person might have applied to his best of abilities, but still each could have made various errors along the way too... We would have to know more before we might presume certain kinds of outcomes to be more successful than others as long as each of them are tailoring their own balances to their own circumstances...and success is not even guaranteed, either... even if someone does everything correct, success is not guaranteed.