As a successful trader, you should focus on the process instead of the money, because the process is the must important thing for you to get more experience in it, and once you are focus it you never lose your money in trading, so as successful trader you must always be fucus on the process of your trading, for you to get a good profit.
Well, you can't say that one wouldn't have any loss if they stayed focused but it can reduce the potential losses they could get if they weren't completely focused. A trader can't trade without any losses at all, even if someone is an expert in the market, they will still have losses because you can't be right all the time, especially when you are in such a volatile and unpredictable market.
You are right about focus being a necessary aspect if someone wants to be successful in something, especially if it's something where you need to keep yourself updated with what's happening. When we talk about financial markets such as cryptocurrency market, one needs to know every single thing happening to be able to gain success.