This is true for every single website. Of course, there are some systems put in place to make sure that you are getting good security, but if you end up giving your information to someone else for example, they could still log-in. So, you need to make sure that you are doing the right thing and always keeping it secure.
You are the one is responsible to keep your capital safely. The first and the last person should be responsible for it. Exchanges, gambling sites whatever platform should not be your last resort to keep your money safely. You can trust them but you should not put your capital safety in hands of others, on any platform.
I have seen plenty of people who sent their money to others because "they could double it" and I have seen all of those people taking the money and leaving. So, there is nothing wrong with the roobet security system, but even with the greatest system ever, even if you put your money in the most advanced vault humans ever created, if you ended up taking it out and giving it to someone else yourself, then there is nothing the system can do for you.
It is because they have bad capital and risk management. If a person only think of profit and huge profit, in the end it is very likely the person will end with loss or bankruptcy. Not a happy ending in my opinion.
Nobody want to have loss in investment, trading, gambling but it is part of a game and you should afford for loss.