10,000 CAD. On the stock exchange day trading. Lost 30% over 3 months, started to understand what I was doing and earn it back, then went back to work full time and left my money in stocks fully leveraged at 3:1 and watched Goldman Sachs manipulate the market and lost it all when I got margined out.

Started with about 200$ worth of crypto, mostly Dogecoin in 2014 and have significantly improved upon that now. I won't trade stocks ever again.