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This seems a bit exaggerated

When you are able and willing to spend 3+ BTC on a parlay in NCAAB, then a USD 100k+ net profit is probably nothing that is life changing for you. This dude might be a real crack in NCAAB, but in case of doubt, he probably lost 4 parlays like these before and now was able to break even. But you never know, certainly a nice and big win.
As someone who've been making two legged parlays recently and also on basketball this is kind of accurate. Sometimes you could come out ahead then on another day you could start with a few losses then hitting one just to bring things back to even.