Well, no, but that's why I'm noting that additional context would be in place. If the account was created yesterday and they bet millions on something they couldn't possibly have known, then yeah, that's suspicious. However, yesterday there was a similar article about 150 people who made a similarly good bet, but once you did the math these people bet $5,700 per person on average. That isn't particularly suspicious.

Edit: I just realized it was this same article