So, you invested once, got failed, and got a question should you go ahead and invest more

Come on, it was only once. If you got failed ten times in a row than it is real reason to think about it. And only think

Just don't go all-in in one project and you will get good results on a distance
Lol, you put it so bluntly but it's so true. I agree with you, just don't do all-ins and you'll be fine in this market. The possibility is high for you to lose some money but then again so is the possibility to make money.