I think this is a common thing for a gambler .
About one year ago I made collection of 50k satoshi by solved capatcha at freebitco.in and then I made gambling with trick but after one hour continue bet I lost me bet 18 times continuously and finally lost all satoshi .
Actually this is all over the house edge profit .
For example the house edge of freebitco.in is about 5%  ,So I will suggest you to get knowledge about house edge for gambling site before gamble and stop gambling after reaching the house edge .