You know what they say, high risk, high reward.
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I've also heard of folks who started at miniscule amounts, and was able to ran it up to 4-5 digits from a series of games. For instance, this $20 playable ETH to $10,000:

Of course, no wins are guaranteed and luck is random, thus we should always gamble amounts we can afford to lose. Remember, no crying in the casino.
This guy has been exceptionally lucky. And I think he has done very well to cashout, especially when he says it has changed his life (although I think it would be OK to leave a few hundred to continue playing). He probably lives in a low GDP per capita country, so that $10K will give him a lot of purchasing power.