The best way to explain it is to make a good statement rather than making a long and very technical definition that is hard for the reader to understand. So here is my explanation " All trading is an investment but not all investment is trading". It simply means that even trading itself is considered as investment. But investment has many forms aside from just trading, it could be investment in networking, loans, business and many more.
You defined it as a comparison that a good definition. But if people need to decide on choosing between trading and investing they also need the similarities of the two. In every trading and investment there is always a risk and one should always have a source of bitcoin before starting one of these. So for further decision it always depend on the people will choose. Because it is better to do things that you really like to do for you to do it with your best and to earn with no problem.
You are right, it is better to do what you like. Some hate trade. Therefore, it is better for them to invest.
The difference between trading and investing in risk
Its not the difference but its the common practice that risk will always follow in trading and investing in both and it will depend on what level of risk you can afford to take and people who don't have any idea of trading will always prefer to go for investment.