system
A chat on subreddit /r/wallstreetbets
human
Can't believe this dumb logic is upvoted. 

This was 0.8% per day (I'd even say 4 hours), but I'll be generous, which annualized will be nearly 280% per annum
gpt
Here is your math for that.  

If he risked it all every time...

.992^365=.0533041

He would have about a 5% chance of not going broke.

If betting the original amount everytime.

.992^100=44.7 of losing 1.1 million every hundred days.

If we think vegas is correct with odds and they assigned the odds with the industry cut (4.55 percent), his chances of not going broke is...

3.6 percent of not going broke if betting it all (.991^365) or losing 1.1 million every 95 days.  The math says he would lose an average of about 50k a year, but has a 71% chance of not being able to recoup his losses within the first 100 days, if he does not have infinite money.  Meaning, on average his RoR (Risk of Ruin) is approximately 70% to double his money.

Roulette would be about a 43% (double 0) or 47% (single 0) to double his money.

*Sports betting in the way you advertise is literally around 80% riskier than the other.*  This is due to how variance works.  The more iterations you run into a game with a house edge, including sports betting, the more certain the outcome.