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Without a doubt if the OP is in profits with those big wins then that means that he is holding a massive amount of skill to become so profitable with their bets, but as we said it is impossible to know if this is actually the case as we have no idea of the full history of bets the OP has made through their life, after all we know that you can get relatively lucky somtimes but the more you gamble the closer your results will go back to the mean, which for most of us it means losing some of our money.
it's common to hear the stories of these unexpected winners and these are quite cool
we just have to remember that they're usually outliers, for each huge winner like that there are tons of losers
therefore, never bet more than you can afford to lose, luck may not be on your side everyday.
And that is the thing, we do not even know if this is an outlier, after all we know that people win big when they gamble all the time, a classic example is the people that earn millions and millions when they win the lottery, however it is also entirely possible that this is just an example of someone that makes big bets that has lost a lot of money during his life but got lucky and recovered some of the money he has lost.