why it becomes increasingly harder to continue the more successful you become (its more than just the silk sheets)
because success erodes asymmetry.
as a result, your expected value paradoxically diminishes the more successful you become.
this is primarily attributed to your risk-to-reward dropping at a rate that your improved win rate (given you are now more capable than ever in x domain) cannot compensate for over time.
and while its probable that the bet you are still being offered today grants enough positive expectancy to still justify taking, its (more than) likely that its just not as unequivocal as the one you were being offered when you first started.
why is that?
well, you went from being a complete loser with little to show for to now being the man in the arena with a lot to show for— and therefore, a lot to lose.
loser with a dream with little to show for who goes for it:
risk 1 to make 100,000,000
breakeven probability = 0.000001%(!)
winner who had a dream and crushed it, considering the next step:
risk 100,000,000 to make 1,000,000,000
breakeven probability = 9.1%
your margin of safety collapses by 9 orders of magnitude.
so when warren buffet advises you to not risk what you have and need in order to pursue what you dont have and dont need—you might want to consider more than just the texture of your sheets.