Investment is not gambling. Investors looking into the Fundamental Analysis examine the overall condition of the company just like Warren Buffett does and invest in the company for long-term gains or short-term when there is changes in company structure as compared to the day you invested. Examples like years to years revenue losses or incurred more debts. Whereby gambling compared is toss the dice, a risky attempt of chances.

My biggest mistake is never follow the stop loss rules strictly, this is No. 1 rules in trading, always keep your losses small, you can always win big..I was holding AMD stock, market started to sell because Covid fears and the most hit was the tech stocks. Down at least 8%, still thinking tomorrow will rebounce. Always follow the rules..
Another mistakes of mine is average down on Futu stock, average down on bearish stock is like catching a falling knife, your capitals will be stuck there at a loss. Beware..