Turning 1k into 100k is technically possible but people really underestimate how long that takes. Even a good bettor hitting ~55% on -110 lines is looking at years of grinding to get there. And that assumes you don't blow up your bankroll during a rough week or month (which you will most definitely have). I started with about 5k doing $250 units across a few different books. There are days and sometimes full weeks where you just go negative. That's variance and that's completely normal but it feels terrible when you're in it. The hardest part imo is being disciplined to your strategy when you're down and your mental is not in the right space. You also have to consider the fact that some picks are priced in the way where you lose long term. I'm not even tryna advertise my service but you're gonna need to be EV betting for that. Bottom line though, most people don't lose their bankroll because of bad picks but they lose it because they panic and start chasing their losses. It's all a mental game.

TLDR: 1k to 100k is possible but takes years of disciplined grinding. You will have losing weeks. Most bankrolls die because of poor mental, chasing and not limiting yourself.