my worst mistake was always being too emotional when it comes to trading. which have always made me make irrational decisions which turn out to be wrong and cost me money.
That's sad to loose money in trading and gambling, as it is our hard earned coins and just loosing it a really worst feeling to have, though I haven't lost anything in trading but yes I have lost many times in gambling, So my worst decision was to gamble with my bitcoins which ended me up by loosing all my coins.