Gambling is totally dependent on luck and experience. If you are a real gambler, you obviously bet again after lose. You know that gambling depends on luck, you can win on second time. so, I think betting double after losing is not a bad decision, if your destiny is with you then you will win.
Trying to betting double is good, but we don't have to always try to betting double because we need to know the timing to place betting double. Sometimes, we forget about that, and we only use that way, and in the end, we lose all of the money. I guess that betting as usual without trying to do double will be enough for me because I don't use gambling as searching for the money.