Realizing that had I saved all the btc I've gambled with, I could buy a new car.
Well those times that you need to realize that you had earned good in gambling or instead of gambling your money you can even buy your own home. Its one of the worst feeling and its getting to your nerves. Just move on.
yes to keep thinking something in the past won't change anything.
better to looking forward and build a new plan. gambling with bitcoin will always about like 'how you could be , if bla bla bla'. the worst thing are after that , when you keep chasing your target as you always remember what supposed happened to you with that 'if' .