i lost bitcoin because trade, but since first time i know bitcoin i was never lost my bitcoin and my bitcoin still secure till now because i was never got hacked and exchange scammer, i hope i never get it
To learn how to trade someone would have to experience it at first like you said you lost some bitcoin in it, so you should not be worried about that because having experience is something great for trading that will help you do it in a better way in future, you should just be careful from hyips and scam sites that might give you some pain if you invest their.