The mathematical chances of achieving a 20,000x stock market return in 2 years through pure luck are 1 in 62 million, and this ASSUMES aggressive, everyday trading with perfect execution on highly volatile assets. If a person tries to achieve this by simply buying and holding a single stock for two years, the irl odds drop to virtually zero as no standard stock in financial history has ever posted those returns in that timeframe, so no a single stock returns of 20,000x is not possible so we can rule out single stock "luck"
look at the math of compounding over roughly 500 trading days assuming the number of stock market days in two years, to achieve a 20,000x return over 500 days, an investor must average a 2% profit every single day without fail. suppose someone day-trades highly volatile penny stocks. Every day, the stock either goes up 10% or down 10% (a 50/50 coin flip). To hit the 20,000x mark, they would need to correctly guess right at least 312 times out of 500. statistically, the odds of flipping a coin 500 times and getting 312 or more heads is 0.0000016%
A smart guy like L trading stocks and relying on Luck seems extremely unlikely for me, the math ain't mathing, it would make L a complete dumbfuck if he relied entirely on luck.