This is my lichess profile: https://lichess.org/@/ekzyis
As you can see, my rating is currently 838.
Who wants to bet 1k sats to win 1k sats if I don't reach a rating of 900 this week?
Since I gain between 4-7 points per win, I would have to win between 9 and 15 games in a row to reach 900.
Let me know if you're interested in a slightly different bet.